TidePlanet

Today in Ryōtsu-minato there are high tides at 2:52 am (1.3 ft) and 6:30 pm (1.1 ft) and low tides at 11:07 am and 10:06 pm. Tide coefficient 94. Right now the tide is rising toward the high tide at 6:30 pm. The sun rises at 6:08 am and sets at 4:51 pm: 10 h 43 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 6:55 pm. Major solunar periods run from 12:47 am to 2:47 am and from 1:19 pm to 3:19 pm. The next spring tides arrive from October 27 to 29. The sea is slight, with 3.7 ft waves. There's a light air from the southeast (3 mph). Overcast, 58 °F.

Fishing

Fishing in Ryōtsu-minato today

Fishing forecast, 7 days →

Best time to fish

Solunar activity today: medium
6
Average day · 6 out of 10 9:10–11:10 pm Also 1:50–2:50 am and 5:30–7:30 pm
  • Low tide at 10:06 pm
  • Falling pressure (−0.14 inHg in 24 h), light offshore wind (4 mph) and some swell (2.6 ft waves) to stir the water
  • Waning gibbous: a bit more activity than at the quarters
  • Highest tide coefficient today: 94 (spring tides)

Your day at a glance

The best window, 9:10 pm to 11:10 pm, combines the 10:06 pm low tide, falling pressure and some swell. Also worth a try from 1:50 am to 2:50 am, with the 2:52 am high tide and a major period, though with rising pressure. Also good from 5:30 pm to 7:30 pm, with the 6:30 pm high tide, moonrise and some swell.

How it works · Next 7 days · Fishing rules

Beach

Beach day in Ryōtsu-minato

Beach forecast, 7 days →

Is it a beach day?

0
Not a beach day · 0 out of 10 No good beach time today.
  • Sun and clouds
  • Onshore breeze (6 mph)
  • UV 4 (moderate): SPF 30 sunscreen
  • Water at 70 °F (nice)
  • Low tide at 11:07 am: more sand
  • Feels like 55 °F: chilly for the beach

Today, hour by hour

  • Swimming Use care · 5.5 ft

    5.5 ft waves every 8 s: swim with care and stay where you can stand. Moderate rip current risk. Always follow the lifeguard's flags.

  • Water 70 °F

    Nice for swimming.

  • Sun & sunscreen UV 4 · SPF 30

    Max UV 4 (moderate): SPF 30 sunscreen, reapplied every 2 hours.

  • Wind 6 mph

    Onshore breeze (6 mph).

  • Tide & sand 10:06 pm

    Low tide at 11:07 am and 10:06 pm: that's when there's the most sand. High tide at 2:52 am and 6:30 pm.

We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days

Beaches near Ryōtsu-minato

We don't know of any named beaches within 6.2 mi of Ryōtsu-minato.

Missing one? Beaches come from OpenStreetMap: you can add it there. Add or fix on OpenStreetMap

Beaches and amenities: © OpenStreetMap contributors (ODbL).

Tides

Tides in Ryōtsu-minato

Tides for 7 days →

Today's high and low tides

  • ▲ High tide 2:52 am 1.3 ft · coef. 94
  • ▼ Low tide 11:07 am 0.2 ft
  • ▼ Low tide 10:06 pm 1.1 ft

↑ Rising The tide is rising. 4 h 17 min to high tide at 6:30 pm.

Tide coefficient 94 for the 2:52 am high tide and 89 for the 6:30 pm high tide. Spring tides. The water rises and falls 1.1 ft between the highest high and the lowest low: a large range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?

2026 extremes: the highest tide of the year is on August 12 (1.6 ft) and the lowest, on April 19 (-0.5 ft).

Mixed: two high and two low tides a day, but of quite different heights.

Heights above chart datum (CD), the zero of that port's nautical charts. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. chart datum (CD)

Tide coefficient and range in October

The biggest tides of the month came from October 27 to 28 (coefficient 99, 1.0 ft range). The smallest, from October 19 to 20 (coefficient 25, 0.6 ft).

Tide and solunar table · this week

Day Sun Tide 1Tide 2Tide 3Tide 4 Coef. Moon Major periods Activity
Today, Thu 29 6:08 am · 4:51 pm High tide 2:52 am · 1.3 ft Low tide 11:07 am · 0.2 ft High tide 6:30 pm · 1.1 ft Low tide 10:06 pm · 1.1 ft Coef. 94 88% Major periods 12:47 am · 1:19 pm Medium
Fri 30 6:09 am · 4:50 pm High tide 3:32 am · 1.4 ft Low tide 12:03 pm · 0.3 ft — — Coef. 86 80% Major periods 1:51 am · 2:24 pm High
Sat 31 6:10 am · 4:49 pm High tide 4:20 am · 1.4 ft Low tide 1:06 pm · 0.3 ft — — Coef. 74 69% Major periods 2:55 am · 3:26 pm Medium
Sun 1 6:12 am · 4:48 pm High tide 5:16 am · 1.3 ft Low tide 2:16 pm · 0.3 ft — — Coef. 63 58% Major periods 3:56 am · 4:24 pm Medium
Mon 2 6:13 am · 4:47 pm High tide 6:27 am · 1.2 ft Low tide 3:27 pm · 0.4 ft — — Coef. 56 Last quarter Major periods 4:52 am · 5:18 pm Medium
Tue 3 6:14 am · 4:45 pm High tide 8:05 am · 1.1 ft Low tide 4:33 pm · 0.4 ft High tide 11:48 pm · 1.0 ft — Coef. 59 36% Major periods 5:43 am · 6:07 pm Medium
Wed 4 6:15 am · 4:44 pm Low tide 4:49 am · 0.8 ft High tide 10:04 am · 1.0 ft Low tide 5:31 pm · 0.5 ft — Coef. 62 26% Major periods 6:30 am · 6:53 pm Medium

▲ high tide · ▼ low tide · heights above chart datum (CD). Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.

Where this tide comes from

A · Official station

Tides from the Ryotsu station (JMA), 0.5 mi from Ryōtsu-minato. Times and heights are its predictions.

Station data attribution: Source: Japan Meteorological Agency website (出典:気象庁ホームページ), tide table (潮位表) for Ryotsu (両津), https://www.data.jma.go.jp/kaiyou/db/tide/suisan/suisan.php?stn=RZ. Public Data License (Version 1.0) (https://www.digital.go.jp/resources/open_data/public_data_license_v1.0), compatible with CC BY 4.0. Modified by TidePlanet (気象庁「潮位表」を加工して作成): harmonic constants fitted from the hourly prediction of 2025–2026; not an official JMA product.

How we calculate the tide

Sea and waves

The sea at Ryōtsu-minato

7-day waves

Sea stateSea state: slight

Slight Douglas 3 · gentle breeze, Beaufort 3
Waves 3.7 ft · 7.0 s from the northwest (314°)
Swell 3.5 ft · 5.9 s from the northwest
Current 0.4 mph toward the N

The waves you may find

  • Most commonMost common1.9 ft
  • Significant3.7 ft
  • Highest expectedHighest7.6 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 7.6 ft. Before heading out, expect waves of up to 7.6 ft.

Wind on the coast and offshore

On the coast 3 mph SE · gusts 13
Offshore (12 mi NNE)Offshore 8 mph SSE · gusts 19

Cross-shore wind. The coast faces northeast and the wind blows along the shore: drift and current run parallel to the beach.

Cross-shore Hourly wind →

Wave height, next 7 daysWaves, next 7 days

Waves stay much the same all week. The biggest waves arrive on Thursday 29: 8.1 ft with a period of 9 s, from the northwest (moderate).

Water temperature

Water temperature →
Water now70.2 °F
Today 70.2–70.2 °F air: 49 / 58 °F
Satellite (2 days ago) 70.7 °F measured 0.6 mi away

Water temperature changes how fish behave: in very cold or very warm water they feed less. The water cools over the next few days: about 68.7 °F by Wednesday 4.

Water warmer than normal for late October (+2.3 °F).

Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses

Water temperature →

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 2:13 pm (local time).

Surf

Surf in Ryōtsu-minato today

Surf hour by hour and 7 days →

Surf today

Fair
4
Fair · 4 out of 10 6:00–10:00 am 2.1–3.2 ft
  • 2.1–3.2 ft surf at the shore, a fun size for most surfers
  • 5.4 ft swell at 7 s from the northwest, short: weak, messy waves; it hits this coast at an angle
  • Almost no wind (2 mph): glassy water
  • Falling tide (low tide at 11:07 am)
Surf at the shore 2.1–3.2 ft average – sets
Swell 5.4 ft 7 s · NW · 223 kJ
Wind 2 mph ESE · calm
Water and wetsuit 70.2 °F Springsuit
  • Light: First light 5:41 am · sunrise 6:08 am · sunset 4:51 pm · last light 5:18 pm
  • Tide: high 2:52 am (1.3 ft), low 11:07 am (0.2 ft), high 6:30 pm (1.1 ft) and low 10:06 pm (1.1 ft). Every break has its own tide: some work at low tide and others at high tide. The tide doesn’t change the score here.
  • Water at 70.2 °F: a springsuit or a 2 mm fullsuit.
  • Energy: 223 kJ · Medium power

Today’s surf at a glance

The best window, 6:00 am to 10:00 am, has a good size and glassy water, though with a short-period swell.

An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.

Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.

How it’s calculated · Next 7 days

Diving

Diving in Ryōtsu-minato today

Diving and snorkeling, 7 days →

Diving and snorkeling today

Likely visibility: poor
6
Average day · 6 out of 10 10:20–11:40 am
  • Slack water around low tide (11:07 am): little current from 10:50 am to 11:22 am
  • 4.4 ft swell at 6 s from the northwest: some surge on the bottom
  • Light onshore wind (6 mph)
  • 0.4 mph current toward the north-northwest, weak (model)
  • Sun high: more light underwater
Swell 4.4 ft 6 s · from the NW
Likely visibility Poor Snorkeling: poor
Water and suit 70.2 °F 5 mm wetsuit
Current 0.4 mph toward the NNW
  • Slack water today: high tide 2:52 am (2:30–3:10 am), low tide 11:07 am (10:50–11:22 am), high tide 6:30 pm (6:00–7:50 pm) and low tide 10:06 pm (8:40–11:10 pm)
  • Likely visibility: poor. Swell (up to 10 ft at 8 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
  • Water at 70.2 °F: a 5 mm wetsuit.
  • Snorkeling: better not, with these waves, wind or current.
  • Night dive: dark from 5:18 pm. Waning gibbous (88%), rising at 6:55 pm: a bright night.

Your diving day at a glance

The best window, 10:20 am to 11:40 am, combines slack water at low tide, light wind, weak current and the sun high, though with some swell.

Slack water comes from the tide: in inlets, channels and between islands the water can keep running for an hour or two after. Ask the local dive shop.

Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.

How it works · Next 7 days

Dive sites, wrecks and dive shops nearby

Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors

Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap

Sites: © OpenStreetMap contributors (ODbL).

Weather

Weather in Ryōtsu-minato

14-day weather

Now in Ryōtsu-minato

Now 58 °F Overcast · feels like 55 °F · 49 / 58 °F
Low / high
49 / 58 °F
Rain
0.00 in · 0%
Clouds
89%
Humidity
61%
Dew pointDew point
44 °F
Visibility
15 mi
UV indexUV
1 · low
Air qualityAir
Fair · 38
Saharan dust
No

Pressure and fishing

  • ↗ RisingRising Anglers say fish bite less for a while
  • → SteadySteady Anglers expect normal activity
  • ↘ FallingFalling · now Anglers say fish feed more before the change

Falling now (−0.05 inHg in 3 hours). Over the next 48 hours: −0.30 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Today, hour by hourHour by hour

Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.

Time 12:00 am3:00 am6:00 am9:00 am12:00 pm3:00 pm6:00 pm9:00 pm
Sky OvercastMainly clearClearPartly cloudyOvercastOvercastOvercastOvercast
Temperature 50°50°49°55°58°57°55°57°
Wind (mph) 4 W4 WSW1 E3 SE6 ESE2 SSE2 SW4 SSW
Gusts 171141020111214
Waves 8.1 ft6.8 ft5.8 ft4.9 ft4.3 ft3.5 ft3.0 ft2.5 ft
Rain 0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in
  • 3:00 pm 57° 2 SSE 3.5 ft
  • 6:00 pm 55° 2 SW 3.0 ft
  • 9:00 pm 57° 4 SSW 2.5 ft
  • 12:00 am 57° 5 SSW 2.8 ft
  • 3:00 am 58° 5 SW 3.7 ft
  • 6:00 am 60° 7 SSW 4.2 ft
  • 9:00 am 63° 6 SSW 4.5 ft
  • 12:00 pm 65° 7 SW 4.6 ft

Next 14 daysComing days

Day Sky Low / high Max wind Max wave High tides
Today · 29 Overcast 49 / 58 °F 6 mph S 8.1 ft 2:52 am · 6:30 pm
Fri 30 Light rain 57 / 65 °F 7 mph SW 4.6 ft 3:32 am
Sat 31 Light rain 50 / 59 °F 15 mph WNW 7.3 ft 4:20 am
Sun 1 Overcast 48 / 58 °F 8 mph WNW 6.8 ft 5:16 am
Mon 2 Light rain 54 / 60 °F 10 mph SW 5.3 ft 6:27 am
Tue 3 Drizzle 48 / 60 °F 8 mph WNW 5.1 ft 8:05 am · 11:48 pm
Wed 4 Overcast 48 / 60 °F 11 mph NNE 3.8 ft 10:04 am
Thu 5 Overcast 54 / 66 °F 6 mph SE 3.2 ft 12:05 am · 11:44 am
Fri 6 Light drizzle 47 / 60 °F 13 mph W 7.8 ft 12:23 am · 1:03 pm
Sat 7 Overcast 42 / 50 °F 8 mph NW 7.3 ft 12:42 am · 2:08 pm
Sun 8 Heavy drizzle 43 / 57 °F 10 mph SW 5.4 ft 12:58 am · 3:05 pm
Mon 9 Drizzle 43 / 50 °F 7 mph NW 7.2 ft 1:16 am · 3:57 pm
Tue 10 Heavy drizzle 43 / 51 °F 12 mph WNW 7.9 ft 1:38 am · 4:46 pm
Wed 11 Light drizzle 43 / 53 °F 5 mph WSW 7.3 ft 2:05 am · 5:35 pm
  • Fri 30 Light rain 57° / 65° 4.6 ft
  • Sat 31 Light rain 50° / 59° 7.3 ft
  • Sun 1 Overcast 48° / 58° 6.8 ft
  • Mon 2 Light rain 54° / 60° 5.3 ft
  • Tue 3 Drizzle 48° / 60° 5.1 ft
  • Wed 4 Overcast 48° / 60° 3.8 ft
  • Thu 5 Overcast 54° / 66° 3.2 ft
See all 14 days →

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

  • Normal Today, cooler than normal for late October (−5.2 °F; normal high: 63 °F). Climate by month →

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 2:13 pm (local time).

Sun

The sun in Ryōtsu-minato

Sunrise and sunset →

Sunrise and sunset

Rises 6:08 am in the ESE (106°)ESE
Sets 4:51 pm in the WSW (253°)WSW
  • First light 5:10 am
  • Full dark 5:49 pm
  • Civil dawn 5:41 am
  • Civil dusk 5:18 pm
  • Solar noon 11:30 am (39° high)
  • Daylight 10 h 43 min (−2 min)
  • Evening golden hour 4:14 pm
  • Full dark 5:49 pm

Golden hour and the day-night map

Morning golden hour6:08–6:45 am
Evening golden hour4:14–4:51 pm
Ryōtsu-minato

Today the sun is 92,344,865 mi away and looks 32′ 11″ across.

Moon and solunar

The moon in Ryōtsu-minato

The moon for 7 days →

Moon phase and position

Waning gibbous · 88% 88% illuminated · 18.5 days old New moon on Mon, Nov 9 · 4:03 pm
Rises 6:55 pm in the NE (54°)NE
Sets 10:48 am tomorrow · in the NW (306°) · set at 9:41 am
Transit 1:47 am overhead
Visible 15 h 53 min from 6:55 pm to 10:48 am

Today the moon is 226,480 mi away and looks 32′ 46″ across.

Solunar periods

Today's activity: medium
  • 12:47–2:47 am Major · the moon passes overhead · high activity
  • 1:19–3:19 pm Major · the moon passes underfoot · high activity
  • 9:11–10:11 am Minor · moonset · medium activity
  • 6:25–7:25 pm Minor · moonrise · medium activity

According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.

Upcoming moon phases

2026 moon calendar →
  • Last quarter Mon, Nov 2 · 5:29 amNov 2 in 4 days
  • New moon Mon, Nov 9 · 4:03 pmNov 9 in 11 days
  • First quarter Tue, Nov 17 · 8:48 pmNov 17 in 19 days
  • Full moon Tue, Nov 24 · 11:54 pmNov 24 in 26 days

Perigee on October 29, 226,426 mi away, coinciding with the spring tides from October 27 to 29: they will be stronger than usual.

Place

Where to fish in Ryōtsu-minato

All places in Niigata →

Piers, ramps and tackle shops nearby

Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors

Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap

Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.

Water depth

Deepens quickly

The bottom deepens quickly: 33 ft of water 1,000 ft from shore. It reaches 164 ft at 1.9 mi.

From the shoreline (750 ft from Ryōtsu-minato) out to sea, heading northeast.

How far from shore

  • 16 ft deep500 ft
  • 33 ft deep1,000 ft
  • 66 ft deep0.85 mi
  • 164 ft deep1.9 mi

For fishing, swimming and diving

  • Shore fishing. Deep water close in: about 11 ft just 330 ft out. Good for casting from rocks, jetties or the beach itself; current and surf hit harder here.
  • Swimming. The bottom drops quickly near the shore and you are soon out of your depth. Keep an eye on kids and weak swimmers.
  • Diving. Shore diving works here: 33 ft at 1,000 ft and 66 ft at 0.85 mi from shore.

Rough estimate: here the data comes in cells of about 0.3 mi and misses details near shore (rocks, sandbars, small coves).

Source: NOAA ETOPO 2022 (CC0), cells of about 0.3 mi; depth below mean sea level. For reference only: not for navigation or anchoring.

Tides near Ryōtsu-minatoTides nearby

All places in Niigata, A to Z (129) → Sado Island tides →

Ryōtsu-minato at a glance

  • Town or city of about 16,359 people. Coordinates: 38.078° N, 138.439° E.
  • It is 34 mi west of Niigata, the main place in Niigata. The sun rises 3 min later and sets 2 min later than in Niigata.
  • The nearest tide station, Ryotsu, is 0.5 mi to the northwest.
  • Its coast faces northeast.
  • Beaches and harbors nearby: Ryōtsu Kō (0.7 mi).

Questions about Ryōtsu-minatoQuestions

What time is high tide today in Ryōtsu-minato?

Today in Ryōtsu-minato there are high tides at 2:52 am (1.3 ft) and 6:30 pm (1.1 ft) and low tides at 11:07 am and 10:06 pm. Tide coefficient 94.

What time is sunset today in Ryōtsu-minato?

At 4:51 pm. There is light until the end of civil twilight, at 5:18 pm.

What time is sunrise tomorrow in Ryōtsu-minato?

At 6:09 am. First light comes at 5:11 am.

What phase is the moon today?

Waning gibbous, 88% illuminated. New moon on Mon, Nov 9 · 4:03 pm.

When are the next spring tides?

From October 27 to 29, together with the lunar perigee: they will be stronger than usual.

What are today's solunar periods?

Major 12:47–2:47 am, Minor 9:11–10:11 am, Major 1:19–3:19 pm, Minor 6:25–7:25 pm. Today's activity is medium.

What's the weather like today in Ryōtsu-minato?

Overcast, from 49 °F to 58 °F, with a light air from the southeast (3 mph) and a 0% chance of rain.

How is the sea today in Ryōtsu-minato?

Slight (Douglas 3): 3.7 ft waves with a period of 7.0 s from the northwest. The water is 70.2 °F.

When is the best time to visit Ryōtsu-minato?

The best time to visit Ryōtsu-minato is in June and in August: highs of 74 °F to 84 °F, about 12 rainy days a month and 6 hours of sunshine a day.

Can I use this data for navigation?

No. These are predictions for fishing and leisure; for navigation, use the official publications.

Where this data comes from

Tide: Ryotsu point of the Japan Meteorological Agency (JMA) tide tables. 出典:気象庁ホームページ, under the Public Data License 1.0 (compatible with CC BY 4.0); constants fitted by TidePlanet from two years of its hourly predictions (気象庁「潮位表」を加工して作成). Not an official JMA publication. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).

Spotted a mistake? Tell us · How we calculate the tide

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