The Tide Chart www.thetidechart.com September 2026 · generated 4 Sep 2026, 11:03
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Arakawa · September 2026 11:03 · UTC+9
Japan Nagasaki 32.917° N · 129.055° E

Arakawa Tide Chart

Tide predictions, solunar fishing times and marine weather for Arakawa, Japan — updated daily, free forever.

Rising
0.1 m
High in 2h 17m
0.4 m at 13:20
Last low tide: -0.9 m at 06:40

The water level is rising. Next high tide in 2 h 17 min (13:20).

05:59 18:45 Coefficient 33 · low Calculated for Arakawa's local time · UTC+9

At a glance

Wind 24 kn from NE · gust 22 kn Waves 1.2 m from ENE · 6 s Fish activity Slow 2 major + 2 minor periods Air temp 25° feels like 24° Water temp 29° Sea surface Pressure 1006 hPa Steady UV index 2 Low exposure Coefficient 33 41 morning · 33 afternoon

Pick a date

September 2026

Tides

Low 06:40 · -0.9 m High 13:20 · 0.4 m Low 18:50 · -0.1 m
High Low Daylight · 12h 46m Major Minor

L 06:40 -0.9 m H 13:20 0.4 m L 18:50 -0.1 m

Interpolated estimate · FES2022 global tide model · heights referenced to Mean Sea Level · Asia/Tokyo (UTC+9) · Why might this differ?

HAT
0.4 m
highest astronomical tide
MSL
-0.2 m
mean sea level — the chart's zero
LAT
-0.9 m
lowest astronomical tide

The sun rises at 05:59 and sets at 18:45. Today brings 1 high tide and 2 low tides: high water at 13:20 (0.4 m); low water at 06:40 (-0.9 m) and 18:50 (-0.1 m). The sun crosses the local meridian at 12:22, its highest point of the day.

Hour by hour

Interpolated heights · Friday 4 September
HourHeightTrend
00:00 -0.6 m ↘ Falling
01:00 -0.6 m ↘ Falling
02:00 -0.6 m ↘ Falling
03:00 -0.7 m ↘ Falling
04:00 -0.8 m ↘ Falling
05:00 -0.9 m ↘ Falling
06:00 -0.9 m ↘ Falling
07:00 -0.9 m ↗ Rising
08:00 -0.8 m ↗ Rising
09:00 -0.6 m ↗ Rising
10:00 -0.2 m ↗ Rising
11:00 0.1 m ↗ Rising
HourHeightTrend
12:00 0.3 m ↗ Rising
13:00 0.4 m ↗ Rising
14:00 0.4 m ↘ Falling
15:00 0.3 m ↘ Falling
16:00 0.2 m ↘ Falling
17:00 0.1 m ↘ Falling
18:00 0.0 m ↘ Falling
19:00 -0.1 m ↘ Falling
20:00 -0.1 m ↘ Falling
21:00 -0.1 m ↘ Falling
22:00 -0.1 m ↘ Falling
23:00 -0.1 m ↘ Falling

Sea & weather now

Conditions at Arakawa right now, in station-local time.

Air temp 25°C Showers · feels like 24° · H 27° · L 24°
Water temp 29°C 29° to 30° today
Wind 24 kn NE · Force 6 · Strong breeze · gusts 22 kn
Swell 1.2 m ENE · 6 s period
Humidity 91% Dew point 23°
Visibility 15 km Cloud cover 100%

Next 24 hours

temperature · wind · rain · humidity
00:00 Overcast 27° 15 ENE 23% 0.0 79%
02:00 Light showers 26° 15 ENE 67% 1.8 84%
04:00 Drizzle 26° 17 ENE 88% 0.9 84%
06:00 Overcast 26° 22 NE 77% 0.0 83%
08:00 Drizzle 26° 22 NE 85% 0.6 87%
10:00 Light drizzle 26° 22 NE 93% 0.3 88%
12:00 Dense drizzle 25° 23 NE 94% 1.1 89%
14:00 Drizzle 25° 22 ENE 87% 0.8 89%
16:00 Drizzle 24° 30 ENE 73% 0.5 91%
18:00 Overcast 25° 29 ENE 52% 0.0 72%
20:00 Overcast 25° 27 ENE 22% 0.0 72%
22:00 Overcast 25° 24 NE 5% 0.0 68%
23:00 Overcast 25° 29 NE 4% 0.0 65%

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

Fishing barometer

1006 hPa → Stable
  • Rising Very good Rising pressure after a low signals settling weather — fish feed confidently and this is often the best barometer window of all.
  • Stable Normal activity — today 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 1005 hPa max 1007 hPa Hover, tap or arrow-key the line to read any hour.

The barometer is holding steady. Expect routine feeding behaviour, with the usual peaks around tide changes and the solunar periods rather than any pressure-driven surge.

UV index

solar protection

UV 2

Low

Low exposure — no sun protection is needed for most people. Enjoy the water freely.

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 29° Ranges 29° to 30° today
30°
0 h
29°
2 h
29°
4 h
29°
6 h
29°
8 h
29°
10 h
29°
12 h
29°
14 h
29°
16 h
29°
18 h
29°
20 h
29°
22 h
29°
24 h

The sea surface holds around 29.3° today, moving between 29.1° and 29.5°. 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
  • Fri 4 Dense drizzle 27°/24° 31 kn
  • Sat 5 Overcast 26°/24° 31 kn
  • Sun 6 Light drizzle 26°/25° 26 kn
  • Mon 7 Overcast 26°/26° 30 kn
  • Tue 8 Clear sky 27°/26° 25 kn
  • Wed 9 Partly cloudy 26°/25° 31 kn
  • Thu 10 Partly cloudy 26°/25° 28 kn

Air quality

Fair · EAQI 27

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

O₃ Ozone Good 48.2µg/m³ Forms in sunlight; can irritate airways at high levels. Bar is scaled to 130 µg/m³, where the "poor" band starts.
PM10 Good 1.5µg/m³ Coarse particles from dust, sea spray and traffic. Bar is scaled to 50 µg/m³, where the "poor" band starts.
PM2.5 Good 1.1µg/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 Arakawa local time.

Tidal coefficient · September

Bigger coefficients mean larger tides and stronger currents
Friday 4 September 33 Low

Morning 41 · afternoon 33

Month range 20 – 104

Heights this month span -1.5 m to 1.3 m 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 ENE (68°) · 5.8 s period
Most frequent waves 0.6 m About half the significant height — what you will see most of the time.
Significant height 1.2 m The standard forecast figure — roughly 1 wave in 7 runs higher, on a 5.8 second period.
Maximum waves 2.4 m The odd crest reaches this — allow for it before heading into exposed water.
Swell height 0 – 2.0 m scale 00:00 · 06:00 · 12:00 · 18:00 · 24:00
0 h 0.7 m 5 s ENE
2 h 0.8 m 4 s NE
4 h 0.9 m 5 s NE
6 h 1.0 m 5 s NE
8 h 1.1 m 5 s NE
10 h 1.2 m 6 s ENE
12 h 1.2 m 6 s ENE
14 h 1.3 m 6 s ENE
16 h 1.4 m 6 s ENE
18 h 1.4 m 6 s ENE
20 h 1.4 m 6 s ENE
22 h 1.4 m 6 s ENE
24 h 1.4 m 6 s ENE

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 Arakawa.

Best fishing times today

Slow

Solunar theory rates today a slow day for fishing at Arakawa — plan around the major and minor periods below.

Major Peak activity

04:40 – 06:40

Moon overhead (lunar transit)

Overlaps sunrise or sunset
Minor Average activity

12:43 – 13:43

Moonset

Major Peak activity

17:11 – 19:11

Moon underfoot (opposing transit)

Overlaps sunrise or sunset
Minor Average activity

22:36 – 23:36

Moonrise

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

Friday 4 September
Last quarter 52% illuminated · 21.9 days old Moonrise 23:06 · Moonset 13:13 · transit 05:40 Visible for 14h 07m
rise 23:06 · 57° ENE set 13:13 · 303° WNW transit 05:40
04 SEP Last Quarter 16:51 today
11 SEP New Moon 12:26 in 7 days
19 SEP First Quarter 05:43 in 15 days
27 SEP Full Moon 01:49 in 23 days

Planner

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

Bite windows

Friday 4 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

05:40 – 07:40

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

High tide turn

12:20 – 14:20

Water peaks at 13:20 then starts to fall.

Prime window

17:50 – 19:50

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

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, 4 September 2026
Moon Distance Earth–Moon 370,729km Angular diameter 0° 32′
Sun Distance Earth–Sun 150,873,319km Angular diameter 0° 32′

Daylight & twilight

Station local time
Golden hour, blue hour and twilight times at Arakawa today, morning and evening.
LightMorningEvening
Golden hourSoft, warm light — the photographer's window 05:44 – 06:32 18:12 – 19:00
Blue hourDeep even blue just past the sun 05:34 – 05:44 19:00 – 19:10
Civil twilightBright enough to work without lights 05:34 – 05:59 18:45 – 19:10
Nautical twilightHorizon still visible at sea 05:05 – 05:34 19:10 – 19:39
Astronomical twilightThe last trace of sunlight 04:34 – 05:05 19:39 – 20:10

Lighting the Earth at this moment

11:03 UTC+9 · 4 September 2026 · equirectangular, 180°W → 180°E
Day and night world map showing where Arakawa sits right now

The bright band marks where the Sun stands overhead right now; the pin is Arakawa. 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 Arakawa.
Day Moon Sun 1st tide 2nd tide 3rd tide 4th tide Coefficient Activity
1 Tue 83% illuminated · waning Sunrise05:58 Sunset18:49 04:30 -1.2 m low tide 10:30 1.0 m high tide 16:40 -0.9 m low tide 22:40 1.1 m high tide 78 · High Fair
2 Wed 74% illuminated · waning Sunrise05:58 Sunset18:47 05:00 -1.2 m low tide 11:20 0.9 m high tide 17:20 -0.6 m low tide 23:10 0.9 m high tide 64 · Average Slow
3 Thu 64% illuminated · waning Sunrise05:59 Sunset18:46 05:50 -1.1 m low tide 12:10 0.7 m high tide 17:50 -0.4 m low tide 23:40 0.8 m high tide 49 · Low Fair
4 Fri 52% illuminated · waning Sunrise05:59 Sunset18:45 06:40 -0.9 m low tide 13:20 0.5 m high tide 18:50 -0.1 m low tide 33 · Low Slow
5 Sat 41% illuminated · waning Sunrise06:00 Sunset18:44 00:20 0.6 m high tide 08:00 -0.8 m low tide 16:10 0.4 m high tide 21:00 0.1 m low tide 40 · Low Slow
6 Sun 30% illuminated · waning Sunrise06:01 Sunset18:42 01:50 0.4 m high tide 10:00 -0.8 m low tide 18:00 0.6 m high tide 23:20 0.0 m low tide 55 · Average Fair
7 Mon 20% illuminated · waning Sunrise06:01 Sunset18:41 04:20 0.4 m high tide 11:30 -1.0 m low tide 18:40 0.8 m high tide 71 · High Fair
8 Tue 12% illuminated · waning Sunrise06:02 Sunset18:40 00:20 -0.3 m low tide 05:50 0.6 m high tide 12:30 -1.2 m low tide 19:20 1.0 m high tide 85 · High Fair
9 Wed 5% illuminated · waning Sunrise06:03 Sunset18:38 01:10 -0.6 m low tide 06:50 0.9 m high tide 13:20 -1.4 m low tide 19:50 1.1 m high tide 96 · Very high Excellent
10 Thu 1% illuminated · waning Sunrise06:03 Sunset18:37 01:40 -0.8 m low tide 07:40 1.1 m high tide 14:00 -1.5 m low tide 20:20 1.2 m high tide 102 · Very high Excellent
11 Fri 0% illuminated · waning Sunrise06:04 Sunset18:36 02:20 -1.0 m low tide 08:20 1.2 m high tide 14:30 -1.4 m low tide 20:50 1.3 m high tide 104 · Very high Excellent
12 Sat 1% illuminated · waxing Sunrise06:05 Sunset18:34 02:50 -1.2 m low tide 08:50 1.3 m high tide 15:10 -1.3 m low tide 21:10 1.2 m high tide 100 · Very high Excellent
13 Sun 5% illuminated · waxing Sunrise06:05 Sunset18:33 03:20 -1.3 m low tide 09:30 1.2 m high tide 15:40 -1.1 m low tide 21:40 1.2 m high tide 92 · Very high Excellent
14 Mon 10% illuminated · waxing Sunrise06:06 Sunset18:31 03:50 -1.3 m low tide 10:10 1.1 m high tide 16:10 -0.9 m low tide 22:00 1.1 m high tide 80 · High Excellent
15 Tue 17% illuminated · waxing Sunrise06:07 Sunset18:30 04:20 -1.2 m low tide 10:40 0.9 m high tide 16:40 -0.7 m low tide 22:20 0.9 m high tide 66 · Average Fair
16 Wed 25% illuminated · waxing Sunrise06:07 Sunset18:29 04:50 -1.1 m low tide 11:10 0.8 m high tide 17:00 -0.5 m low tide 22:40 0.8 m high tide 52 · Average Slow
17 Thu 34% illuminated · waxing Sunrise06:08 Sunset18:27 05:30 -1.0 m low tide 11:50 0.6 m high tide 17:30 -0.3 m low tide 23:10 0.7 m high tide 37 · Low Fair
18 Fri 43% illuminated · waxing Sunrise06:09 Sunset18:26 06:10 -0.8 m low tide 12:40 0.4 m high tide 18:00 -0.1 m low tide 23:40 0.5 m high tide 24 · Low Slow
19 Sat 53% illuminated · waxing Sunrise06:09 Sunset18:25 07:10 -0.6 m low tide 14:40 0.2 m high tide 19:20 0.1 m low tide 20 · Low Slow
20 Sun 62% illuminated · waxing Sunrise06:10 Sunset18:23 00:30 0.3 m high tide 08:50 -0.5 m low tide 17:20 0.3 m high tide 22:30 0.1 m low tide 31 · Low Fair
21 Mon 71% illuminated · waxing Sunrise06:10 Sunset18:22 02:40 0.2 m high tide 10:40 -0.6 m low tide 18:10 0.5 m high tide 23:50 -0.1 m low tide 44 · Low Fair
22 Tue 79% illuminated · waxing Sunrise06:11 Sunset18:21 05:00 0.3 m high tide 11:40 -0.8 m low tide 18:40 0.7 m high tide 59 · Average Fair
23 Wed 87% illuminated · waxing Sunrise06:12 Sunset18:19 00:20 -0.3 m low tide 06:00 0.5 m high tide 12:20 -1.0 m low tide 19:00 0.8 m high tide 73 · High Fair
24 Thu 93% illuminated · waxing Sunrise06:12 Sunset18:18 00:50 -0.6 m low tide 06:40 0.7 m high tide 13:00 -1.1 m low tide 19:20 1.0 m high tide 85 · High Excellent
25 Fri 97% illuminated · waxing Sunrise06:13 Sunset18:17 01:20 -0.8 m low tide 07:20 0.9 m high tide 13:30 -1.2 m low tide 19:50 1.1 m high tide 95 · Very high Excellent
26 Sat 100% illuminated · waxing Sunrise06:14 Sunset18:15 01:50 -1.0 m low tide 07:50 1.1 m high tide 14:00 -1.2 m low tide 20:10 1.2 m high tide 101 · Very high Excellent
27 Sun 100% illuminated · waning Sunrise06:14 Sunset18:14 02:20 -1.2 m low tide 08:30 1.2 m high tide 14:40 -1.2 m low tide 20:40 1.2 m high tide 102 · Very high Excellent
28 Mon 97% illuminated · waning Sunrise06:15 Sunset18:13 02:50 -1.4 m low tide 09:00 1.3 m high tide 15:10 -1.1 m low tide 21:00 1.2 m high tide 99 · Very high Excellent
29 Tue 93% illuminated · waning Sunrise06:16 Sunset18:11 03:30 -1.5 m low tide 09:40 1.2 m high tide 15:50 -0.9 m low tide 21:30 1.1 m high tide 90 · Very high Excellent
30 Wed 86% illuminated · waning Sunrise06:16 Sunset18:10 04:00 -1.4 m low tide 10:20 1.1 m high tide 16:20 -0.7 m low tide 22:00 1.0 m high tide 78 · High Fair

Biggest tides: 9–12 Sep (coef 104) · Quietest stretch: 18–19 Sep (coef 20) · Morning 41 · afternoon 33. Predicted levels run between -1.5 m and 1.3 m this month.

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

Nearby

Other tide stations close to Arakawa, ranked by distance.

Fishing sites near Arakawa

this station in gold · nearby stations in green

Map data © OpenStreetMap contributors.

All Nagasaki locations

Sasebo Isahaya Ōmura Shimabara Minamishimabara Unzen Hirado Togitsu Tsushima Fukuechō Matsuura Kamigotō Kawatana Sonogishukugō Ojika Abamachi Arakawa Arikawa Haiki Hirugaura Izuhara Kagamigawachō Kamoise Kamoise Kōnoura Kōnoura Motofunamachi Ōkubochō Ōsaki Ōsaki

Frequently asked questions

Tides, coefficients and fishing times for Arakawa, explained.

What time is high tide in Arakawa today?

High water at Arakawa today is at 13:20. 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 Arakawa?

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 33 (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 Arakawa today?

The sun rises at 05:59 and sets at 18:45 local time, giving 12h 46m of daylight.

What is the water temperature in Arakawa today?

The sea surface at Arakawa is around 29.2°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 Arakawa today?

The significant wave height at Arakawa is currently 1.2 m with a period of 5.8 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/jp/nagasaki/arakawa-nakadori-jima