The Tide Chart www.thetidechart.com September 2026 · generated 3 Sep 2026, 21:41
The Tide Chart
Sign in Get started
Porpoise Key, Big Spanish Channel · September 2026 21:41 · UTC−4
United States Florida 24.718° N · 81.352° W

Porpoise Key, Big Spanish Channel Tide Chart

Tide predictions, solunar fishing times and marine weather for Porpoise Key, Big Spanish Channel, United States — updated daily, free forever.

Falling
-0.1 ft
Low in 1h 19m
-0.2 ft at 11:00 PM
Last high tide: 0.1 ft at 7:10 PM

The water level is falling. Next low tide in 1 h 19 min (23:00).

7:07 AM 7:41 PM Coefficient 40 · low Calculated for Porpoise Key, Big Spanish Channel's local time · UTC−4

At a glance

Wind 2 mph from ESE · gust 2 mph Waves 0.3 ft from S · 3 s Fish activity Slow 2 major + 1 minor periods Air temp 86° feels like 95° Water temp 90° Sea surface Pressure 29.94 inHg Rising UV index 8 Very high exposure Coefficient 40 48 morning · 40 afternoon

Pick a date

September 2026

Tides

High 5:00 AM · 1.1 ft Low 12:30 PM · -1.2 ft High 7:10 PM · 0.1 ft Low 11:00 PM · -0.2 ft
High Low Daylight · 12h 34m Major Minor

H 5:00 AM 1.1 ft L 12:30 PM -1.2 ft H 7:10 PM 0.1 ft L 11:00 PM -0.2 ft

Gauge station · FES2022 global tide model · heights referenced to Mean Sea Level · America/New_York (UTC−4) · Why might this differ?

HAT
1.1 ft
highest astronomical tide
MSL
0.0 ft
mean sea level — the chart's zero
LAT
-1.2 ft
lowest astronomical tide

The sun rises at 07:07 and sets at 19:41. Today brings 2 high tides and 2 low tides: high water at 05:00 (0.3 m) and 19:10 (0.0 m); low water at 12:30 (-0.4 m) and 23:00 (-0.1 m). The sun crosses the local meridian at 13:24, its highest point of the day.

Hour by hour

Interpolated heights · Thursday 3 September
HourHeightTrend
12:00 AM 0.5 ft ↗ Rising
1:00 AM 0.6 ft ↗ Rising
2:00 AM 0.7 ft ↗ Rising
3:00 AM 0.9 ft ↗ Rising
4:00 AM 1.1 ft ↗ Rising
5:00 AM 1.1 ft ↘ Falling
6:00 AM 1.0 ft ↘ Falling
7:00 AM 0.7 ft ↘ Falling
8:00 AM 0.3 ft ↘ Falling
9:00 AM -0.2 ft ↘ Falling
10:00 AM -0.6 ft ↘ Falling
11:00 AM -1.0 ft ↘ Falling
HourHeightTrend
12:00 PM -1.2 ft ↘ Falling
1:00 PM -1.2 ft ↗ Rising
2:00 PM -1.0 ft ↗ Rising
3:00 PM -0.8 ft ↗ Rising
4:00 PM -0.5 ft ↗ Rising
5:00 PM -0.2 ft ↗ Rising
6:00 PM 0.0 ft ↗ Rising
7:00 PM 0.1 ft ↗ Rising
8:00 PM 0.1 ft ↘ Falling
9:00 PM 0.0 ft ↘ Falling
10:00 PM -0.1 ft ↘ Falling
11:00 PM -0.2 ft ↗ Rising

Sea & weather now

Conditions at Porpoise Key, Big Spanish Channel right now, in station-local time.

Air temp 86°F Clear sky · feels like 95° · H 87° · L 85°
Water temp 89°F 88° to 89° today
Wind 3 mph ESE · Force 1 · Light air · gusts 2 mph
Swell 0.3 ft S · 3 s period
Humidity 68% Dew point 73°
Visibility 24 km Cloud cover 5%

Next 24 hours

temperature · wind · rain · humidity
12:00 AM Thunderstorm 86° 2 S 47% 0.8 70%
2:00 AM Mainly clear 86° 3 SE 52% 0.0 67%
4:00 AM Clear sky 86° 8 SSE 83% 0.0 70%
6:00 AM Light drizzle 86° 8 SSW 62% 0.1 70%
8:00 AM Light drizzle 86° 7 SSW 6% 0.1 71%
10:00 AM Clear sky 86° 7 SSW 73% 0.0 70%
12:00 PM Drizzle 86° 8 SSW 92% 0.8 71%
2:00 PM Overcast 86° 7 SSW 52% 0.0 70%
4:00 PM Clear sky 86° 8 SW 79% 0.0 70%
6:00 PM Clear sky 86° 6 SW 61% 0.0 69%
8:00 PM Clear sky 86° 1 SSW 0% 0.0 68%
10:00 PM Clear sky 86° 5 E 0% 0.0 69%
11:00 PM Clear sky 86° 7 E 0% 0.0 69%

Rain chance and millimetres per hour, then relative humidity. Scroll for the rest of the day.

Fishing barometer

29.94 inHg ↗ Rising
  • Rising Very good — today Rising pressure after a low signals settling weather — fish feed confidently and this is often the best barometer window of all.
  • Stable Normal activity A steady barometer for a day or more means settled conditions and predictable, average feeding around tides and solunar peaks.
  • Falling Good at first A dropping barometer sparks a burst of feeding before the weather turns, then activity slows markedly as the front arrives.
min 29.88 inHg max 29.97 inHg Hover, tap or arrow-key the line to read any hour.

The barometer is rising, which usually switches feeding back on: fish sense settling conditions and move to feed with confidence. A rising trend after a spell of low pressure is one of the strongest signals to get out on the water.

UV index

solar protection

UV 8

Very high

Very high exposure — unprotected skin burns quickly. Cover up, reapply sunscreen often and keep out of the midday sun.

1–2 · Low
Little risk — most people need no sun protection.
3–7 · Moderate to high
Wear a hat, sunglasses and SPF 30+, and take shade around midday.
8+ · Very high to extreme
Use SPF 50+, cover up and stay out of the sun through the middle of the day.
Water temperature 89° Ranges 88° to 89° today
90°
0 h
90°
2 h
88°
4 h
88°
6 h
88°
8 h
88°
10 h
90°
12 h
90°
14 h
90°
16 h
90°
18 h
90°
20 h
90°
22 h
90°
24 h

The sea surface holds around 31.5° today, moving between 31.3° and 31.7°. Water temperature sets the pace of fish metabolism, so even a small shift can change where fish hold and how actively they feed.

Outlook

Next 7 days
  • Thu 3 Drizzle 87°/85° 8 mph
  • Fri 4 Drizzle 87°/85° 12 mph
  • Sat 5 Overcast 87°/85° 14 mph
  • Sun 6 Overcast 87°/86° 12 mph
  • Mon 7 Clear sky 87°/85° 8 mph
  • Tue 8 Overcast 87°/86° 8 mph
  • Wed 9 Light drizzle 87°/86° 15 mph

Air quality

Fair · EAQI 36

Air quality is fair. Fine for outdoor activity; unusually sensitive people should watch for symptoms.

O₃ Ozone Fair 75.5µg/m³ Forms in sunlight; can irritate airways at high levels. Bar is scaled to 130 µg/m³, where the "poor" band starts.
PM10 Good 9.4µg/m³ Coarse particles from dust, sea spray and traffic. Bar is scaled to 50 µg/m³, where the "poor" band starts.
PM2.5 Good 6.1µg/m³ Fine particles that reach deep into the lungs. Bar is scaled to 25 µg/m³, where the "poor" band starts.

Bands follow the European Air Quality Index; the day's index is its worst hour, each pollutant its daily mean. Air quality from CAMS.

Weather & marine data by Open-Meteo.com (CC BY 4.0) · times are Porpoise Key, Big Spanish Channel local time.

Tidal coefficient · September

Bigger coefficients mean larger tides and stronger currents
Thursday 3 September 40 Low

Morning 48 · afternoon 40

Month range 20 – 104

Heights this month span -1.3 ft to 1.3 ft above the chart datum

Biggest tides: 9–12 Sep (coef 104) · Quietest stretch: 18–19 Sep (coef 20)

September 2026 — hover, tap or arrow-key a bar to read that day

Very high High Average Low

A larger coefficient means a wider gap between high and low water, so the strongest currents run along the sea bed. Tidal range also shifts with the weather — check the wind and swell before you head out.

Swell

From S (179°) · 2.8 s period
Most frequent waves 0.3 ft About half the significant height — what you will see most of the time.
Significant height 0.3 ft The standard forecast figure — roughly 1 wave in 7 runs higher, on a 2.8 second period.
Maximum waves 1.0 ft The odd crest reaches this — allow for it before heading into exposed water.
Swell height 0 – 1.6 ft scale 00:00 · 06:00 · 12:00 · 18:00 · 24:00
0 h 0.3 ft 4 s ESE
2 h 0.3 ft 4 s ESE
4 h 0.3 ft 4 s ESE
6 h 0.3 ft 4 s SE
8 h 0.3 ft 3 s SE
10 h 0.7 ft 2 s S
12 h 1.0 ft 2 s SSW
14 h 1.0 ft 2 s SSW
16 h 0.7 ft 3 s S
18 h 0.7 ft 3 s S
20 h 0.3 ft 3 s S
22 h 0.3 ft 3 s S
24 h 0.3 ft 3 s S

These figures describe the swell out in open water. Closer to the beach the waves shift with the shape of the coastline and the seabed, though in most spots they end up broadly similar.

Solunar

Feeding windows from the moon's transit, rise and set — the free solunar rating for Porpoise Key, Big Spanish Channel.

Best fishing times today

Slow

Solunar theory rates today a slow day for fishing at Porpoise Key, Big Spanish Channel — plan around the major and minor periods below.

Major Peak activity

5:17 AM – 7:17 AM

Moon overhead (lunar transit)

Overlaps sunrise or sunset
Minor Average activity

12:54 PM – 1:54 PM

Moonset

Major Peak activity

5:47 PM – 7:47 PM

Moon underfoot (opposing transit)

Overlaps sunrise or sunset
Major period Minor period Daylight

Major periods track the moon's transit and opposing transit and run about two hours; minor periods open at moonrise and moonset and last about an hour. When a period lands on sunrise or sunset, activity climbs higher still — and that overlap happens today.

Moon

Thursday 3 September
Last quarter 58% illuminated · 21.4 days old Moonrise — · Moonset 13:24 · transit 06:17 Visible for 13h 25m
rise — set 13:24 · 299° WNW transit 06:17
04 SEP Last Quarter 3:51 AM tomorrow
10 SEP New Moon 11:26 PM in 7 days
18 SEP First Quarter 4:43 PM in 15 days
26 SEP Full Moon 12:49 PM in 23 days

Planner

When to go this week, and which days of September are worth the drive.

Bite windows

Thursday 3 September

Fish feed hardest when the water starts moving — plan around the hour before and after each tide turn, and doubly so where a turn meets a solunar major period.

Prime window

04:00 – 06:00

Tide turn overlaps a major solunar period — the best bite of the day.

Low tide turn

11:30 – 13:30

Water bottoms out at 12:30 then starts to rise.

Prime window

18:10 – 20:10

Tide turn overlaps a major solunar period — the best bite of the day.

Low tide turn

22:00 – 23:59

Water bottoms out at 23:00 then starts to rise.

Best days in September

Ranked by tidal coefficient — pick a day to load it.

Quietest stretch: 18–19 Sep (coef 20)

Astronomical observation · moon, sun and Earth

today, 3 September 2026
Moon Distance Earth–Moon 371,535km Angular diameter 0° 32′
Sun Distance Earth–Sun 150,887,651km Angular diameter 0° 32′

Daylight & twilight

Station local time
Golden hour, blue hour and twilight times at Porpoise Key, Big Spanish Channel today, morning and evening.
LightMorningEvening
Golden hourSoft, warm light — the photographer's window 6:53 AM – 7:37 AM 7:11 PM – 7:55 PM
Blue hourDeep even blue just past the sun 6:44 AM – 6:53 AM 7:55 PM – 8:04 PM
Civil twilightBright enough to work without lights 6:44 AM – 7:07 AM 7:41 PM – 8:04 PM
Nautical twilightHorizon still visible at sea 6:17 AM – 6:44 AM 8:04 PM – 8:31 PM
Astronomical twilightThe last trace of sunlight 5:49 AM – 6:17 AM 8:31 PM – 8:59 PM

Lighting the Earth at this moment

9:41 PM UTC−4 · 3 September 2026 · equirectangular, 180°W → 180°E
Day and night world map showing where Porpoise Key, Big Spanish Channel sits right now

The bright band marks where the Sun stands overhead right now; the pin is Porpoise Key, Big Spanish Channel. As the Earth turns, the day-and-night line sweeps westward and this map refreshes with the local clock.

Tide table

September 2026
Tide times, heights, coefficient and fishing activity for every day of September 2026 at Porpoise Key, Big Spanish Channel.
Day Moon Sun 1st tide 2nd tide 3rd tide 4th tide Coefficient Activity
1 Tue 78% illuminated · waning Sunrise7:06 AM Sunset7:43 PM 3:50 AM 1.3 ft high tide 10:40 AM -1.0 ft low tide 4:40 PM 0.7 ft high tide 10:10 PM -0.3 ft low tide 71 · High Fair
2 Wed 69% illuminated · waning Sunrise7:06 AM Sunset7:42 PM 4:20 AM 1.3 ft high tide 11:30 AM -1.3 ft low tide 5:40 PM 0.3 ft high tide 10:30 PM -0.3 ft low tide 56 · Average Fair
3 Thu 58% illuminated · waning Sunrise7:07 AM Sunset7:41 PM 5:00 AM 1.0 ft high tide 12:30 PM -1.3 ft low tide 7:10 PM 0.0 ft high tide 11:00 PM -0.3 ft low tide 40 · Low Slow
4 Fri 46% illuminated · waning Sunrise7:07 AM Sunset7:40 PM 5:50 AM 1.0 ft high tide 2:20 PM -1.3 ft low tide 9:30 PM 0.0 ft high tide 11:40 PM 0.0 ft low tide 34 · Low Slow
5 Sat 35% illuminated · waning Sunrise7:08 AM Sunset7:39 PM 6:50 AM 1.0 ft high tide 4:00 PM -1.3 ft low tide 11:10 PM 0.0 ft high tide 48 · Low Fair
6 Sun 24% illuminated · waning Sunrise7:08 AM Sunset7:38 PM 12:40 AM 0.0 ft low tide 8:20 AM 1.0 ft high tide 5:10 PM -1.3 ft low tide 64 · Average Slow
7 Mon 15% illuminated · waning Sunrise7:08 AM Sunset7:37 PM 12:00 AM 0.3 ft high tide 2:20 AM 0.3 ft low tide 4:00 AM 0.3 ft high tide 4:50 AM 0.3 ft low tide 79 · High Fair
8 Tue 8% illuminated · waning Sunrise7:09 AM Sunset7:36 PM 12:40 AM 0.3 ft high tide 6:00 AM 0.0 ft low tide 11:50 AM 1.3 ft high tide 7:00 PM -1.3 ft low tide 91 · Very high Good
9 Wed 3% illuminated · waning Sunrise7:09 AM Sunset7:35 PM 1:10 AM 0.7 ft high tide 6:50 AM -0.3 ft low tide 12:40 PM 1.3 ft high tide 7:40 PM -1.3 ft low tide 100 · Very high Excellent
10 Thu 0% illuminated · waning Sunrise7:09 AM Sunset7:34 PM 1:40 AM 1.0 ft high tide 7:40 AM -0.3 ft low tide 1:30 PM 1.3 ft high tide 8:20 PM -1.0 ft low tide 104 · Very high Excellent
11 Fri 0% illuminated · waxing Sunrise7:10 AM Sunset7:33 PM 2:10 AM 1.0 ft high tide 8:20 AM -0.7 ft low tide 2:20 PM 1.3 ft high tide 9:00 PM -1.0 ft low tide 102 · Very high Excellent
12 Sat 3% illuminated · waxing Sunrise7:10 AM Sunset7:32 PM 2:30 AM 1.0 ft high tide 9:00 AM -1.0 ft low tide 3:00 PM 1.3 ft high tide 9:20 PM -0.7 ft low tide 96 · Very high Excellent
13 Sun 7% illuminated · waxing Sunrise7:10 AM Sunset7:31 PM 2:50 AM 1.0 ft high tide 9:40 AM -1.0 ft low tide 3:40 PM 1.0 ft high tide 9:40 PM -0.7 ft low tide 86 · High Excellent
14 Mon 14% illuminated · waxing Sunrise7:11 AM Sunset7:30 PM 3:20 AM 1.3 ft high tide 10:10 AM -1.3 ft low tide 4:20 PM 0.7 ft high tide 9:50 PM -0.3 ft low tide 73 · High Fair
15 Tue 21% illuminated · waxing Sunrise7:11 AM Sunset7:29 PM 3:40 AM 1.0 ft high tide 10:50 AM -1.3 ft low tide 5:00 PM 0.7 ft high tide 10:00 PM -0.3 ft low tide 59 · Average Fair
16 Wed 30% illuminated · waxing Sunrise7:11 AM Sunset7:28 PM 4:10 AM 1.0 ft high tide 11:30 AM -1.3 ft low tide 5:50 PM 0.3 ft high tide 10:20 PM -0.3 ft low tide 44 · Low Fair
17 Thu 39% illuminated · waxing Sunrise7:12 AM Sunset7:26 PM 4:40 AM 1.0 ft high tide 12:20 PM -1.0 ft low tide 7:00 PM 0.0 ft high tide 10:50 PM -0.3 ft low tide 30 · Low Fair
18 Fri 48% illuminated · waxing Sunrise7:12 AM Sunset7:25 PM 5:20 AM 1.0 ft high tide 1:30 PM -1.0 ft low tide 8:40 PM 0.0 ft high tide 11:30 PM -0.3 ft low tide 20 · Low Slow
19 Sat 58% illuminated · waxing Sunrise7:13 AM Sunset7:24 PM 6:10 AM 0.7 ft high tide 2:50 PM -1.0 ft low tide 10:10 PM 0.0 ft high tide 24 · Low Slow
20 Sun 67% illuminated · waxing Sunrise7:13 AM Sunset7:23 PM 12:30 AM 0.0 ft low tide 7:10 AM 0.7 ft high tide 4:00 PM -1.0 ft low tide 11:10 PM 0.0 ft high tide 38 · Low Fair
21 Mon 76% illuminated · waxing Sunrise7:13 AM Sunset7:22 PM 1:50 AM 0.0 ft low tide 8:50 AM 0.7 ft high tide 5:00 PM -1.0 ft low tide 11:50 PM 0.3 ft high tide 52 · Average Slow
22 Tue 83% illuminated · waxing Sunrise7:14 AM Sunset7:21 PM 4:40 AM 0.0 ft low tide 10:40 AM 0.7 ft high tide 5:50 PM -1.0 ft low tide 66 · Average Fair
23 Wed 90% illuminated · waxing Sunrise7:14 AM Sunset7:20 PM 12:20 AM 0.3 ft high tide 5:40 AM -0.3 ft low tide 11:40 AM 1.0 ft high tide 6:40 PM -1.0 ft low tide 80 · High Good
24 Thu 95% illuminated · waxing Sunrise7:14 AM Sunset7:19 PM 12:50 AM 0.7 ft high tide 6:30 AM -0.3 ft low tide 12:30 PM 1.0 ft high tide 7:20 PM -1.0 ft low tide 91 · Very high Excellent
25 Fri 99% illuminated · waxing Sunrise7:15 AM Sunset7:18 PM 1:20 AM 0.7 ft high tide 7:10 AM -0.7 ft low tide 1:10 PM 1.3 ft high tide 7:50 PM -0.7 ft low tide 99 · Very high Excellent
26 Sat 100% illuminated · waxing Sunrise7:15 AM Sunset7:17 PM 1:40 AM 1.0 ft high tide 7:50 AM -0.7 ft low tide 2:00 PM 1.3 ft high tide 8:20 PM -0.7 ft low tide 102 · Very high Excellent
27 Sun 99% illuminated · waning Sunrise7:15 AM Sunset7:16 PM 1:50 AM 1.0 ft high tide 8:30 AM -1.0 ft low tide 2:40 PM 1.3 ft high tide 8:30 PM -0.3 ft low tide 101 · Very high Excellent
28 Mon 95% illuminated · waning Sunrise7:16 AM Sunset7:15 PM 2:10 AM 1.3 ft high tide 9:10 AM -1.3 ft low tide 3:20 PM 1.0 ft high tide 8:40 PM -0.3 ft low tide 95 · Very high Excellent
29 Tue 89% illuminated · waning Sunrise7:16 AM Sunset7:14 PM 2:40 AM 1.3 ft high tide 9:50 AM -1.3 ft low tide 4:00 PM 1.0 ft high tide 9:00 PM -0.3 ft low tide 84 · High Fair
30 Wed 81% illuminated · waning Sunrise7:17 AM Sunset7:13 PM 3:10 AM 1.3 ft high tide 10:40 AM -1.3 ft low tide 4:50 PM 0.7 ft high tide 9:30 PM -0.3 ft low tide 71 · High Fair

Biggest tides: 9–12 Sep (coef 104) · Quietest stretch: 18–19 Sep (coef 20) · Morning 48 · afternoon 40. Predicted levels run between -1.3 ft and 1.3 ft this month.

Heights are metres above the station's chart datum, so the biggest tides can dip just below zero. Every time shown is Porpoise Key, Big Spanish Channel local time, with daylight saving already applied.

Nearby

Other tide stations close to Porpoise Key, Big Spanish Channel, ranked by distance.

Fishing sites near Porpoise Key, Big Spanish Channel

this station in gold · nearby stations in green

Map data © OpenStreetMap contributors.

All Florida locations

Tampa St. Petersburg Palm Bay Miami Beach Sunrise Fort Myers Daytona Beach North Miami Palm Harbor East Pensacola Heights Coral Gables Titusville North Miami Beach North Fort Myers Dunedin Ponte Vedra Beach Merritt Island Navarre Rockledge Palmetto Bay Fort Walton Beach Coconut Grove Pace Palm Valley Cocoa Marco Island Vero Beach Bayshore Gardens Midway Englewood

Frequently asked questions

Tides, coefficients and fishing times for Porpoise Key, Big Spanish Channel, explained.

What time is high tide in Porpoise Key, Big Spanish Channel today?

High water at Porpoise Key, Big Spanish Channel today is at 05:00 and 19:10. The full list of high and low tide times is in the table above and refreshes every day.

Is today a good day to fish in Porpoise Key, Big Spanish Channel?

Based on solunar theory the fishing rating today is Slow. The strongest windows are the major periods around the lunar transit, which often line up with sunrise and sunset.

What is the tidal coefficient and why does it matter?

The coefficient runs from 0 to 120 and measures the tidal range — today it is 40 (Low). Higher numbers mean stronger currents and a bigger gap between high and low water, which matters for fishing, diving and boating.

When are sunrise and sunset in Porpoise Key, Big Spanish Channel today?

The sun rises at 07:07 and sets at 19:41 local time, giving 12h 34m of daylight.

What is the water temperature in Porpoise Key, Big Spanish Channel today?

The sea surface at Porpoise Key, Big Spanish Channel is around 31.7°C right now. Water temperature sets the pace of fish metabolism, so the hourly strip above is worth a glance — even a small shift can change where fish hold and how actively they feed.

How big are the waves in Porpoise Key, Big Spanish Channel today?

The significant wave height at Porpoise Key, Big Spanish Channel is currently 0.1 m with a period of 2.8 s between crests. Individual sets can stack up to roughly twice that height, so allow a margin at exposed marks and anchorages.

Data: Open-Meteo (CC BY 4.0) · CAMS · OpenStreetMap · GeoNames (CC BY 4.0) · FES2022 — CNES/AVISO/LEGOS · IP geolocation by DB-IP (CC BY 4.0)

Estimates for planning only — not for navigation or safety-critical use. · www.thetidechart.com/us/florida/porpoise-key-big-spanish-channel