Onjuku tides today
- Tide now 4.4 ft ↓ falling · low 11:54 am (3.1 ft)
- Best time to fish 4:20–5:10 pm average day · 6/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 3.7 ft · 77 °F slight · 6.9 s from the east
- Wind · air 10 mph · 61 °F from the ENE, gusts 21 · overcast
- Surf today 1.8–2.7 ft Poor day · 3/10 · 1:00–5:00 pm
- Sun 5:57 am–4:48 pm 10 h 51 min of daylight
- Moon 88% · 6:57 pm waning gibbous · rises at 6:57 pm
Today in Onjuku there are high tides at 6:50 am (4.9 ft) and 5:24 pm (5.4 ft) and low tide at 11:54 am. Tide coefficient 97. Right now the tide is falling toward the low tide at 11:54 am. The sun rises at 5:57 am and sets at 4:48 pm: 10 h 51 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 6:57 pm. Major solunar periods run from 12:39 am to 2:39 am and from 1:11 pm to 3:11 pm. The next spring tides arrive from October 27 to 29. The sea is slight, with 3.7 ft waves. There's a gentle breeze from the east-northeast (10 mph). Overcast, 61 °F.
Fishing in Onjuku today
Best time to fish
Solunar activity today: medium- High tide at 6:50 am, coefficient 97
- Sunrise at 5:57 am
- Rising pressure (+0.47 inHg in 24 h), light offshore wind (6 mph) and some swell (3.4 ft waves) to stir the water
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 97 (spring tides)
Your day at a glance
The best window, 5:50 am to 6:30 am, combines the 6:50 am high tide, sunrise and some swell, though with rising pressure. Also worth a try from 4:20 pm to 5:10 pm, with the 5:24 pm high tide, sunset and some swell, though with rising pressure. Also worth a try from 10:50 am to 12:50 pm, with the 11:54 am low tide, a light onshore breeze and some swell, though with rising pressure.
Species with the most records nearby: striped mullet, Japanese amberjack, mahi-mahi and John Dory. What you can catch
Beach day in Onjuku
Is it a beach day?
- Onshore breeze (10 mph)
- Water at 77 °F (warm)
- Low tide at 11:54 am: more sand
- Cloudy (83% cloud cover)
- Feels like 65 °F: a bit cool
- Rain (0.07 in)
Today, hour by hour
- Swimming Use care · 3.5 ft
3.5 ft waves every 7 s: swim with care and stay where you can stand. Moderate rip current risk. Always follow the lifeguard's flags.
- Water 77 °F
Warm: very pleasant.
- Sun & sunscreen UV 3 · SPF 15
Max UV 3 (low): SPF 15 sunscreen.
- Wind 10 mph
Onshore breeze (10 mph).
- Tide & sand 11:54 am
Low tide at 11:54 am: that's when there's the most sand. High tide at 6:50 am and 5:24 pm. Coefficient 97 (spring tides): little sand left at high tide.
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 Onjuku
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 御宿町 浜海水浴場 0.5 mi · SW
- Parking
- 大波月海岸 1.0 mi · SE
- Parking
- 田尻海岸 1.2 mi · E
- 小浦海岸 1.3 mi · E
- 丹ヶ浦 5.0 mi · NE
- Parking
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near Onjuku
Webcams provided by windy.com — add a webcam
Tides in Onjuku
Today's high and low tides
- ▲ High tide 6:50 am 4.9 ft · coef. 97
- ▼ Next low tide 11:54 am 3.1 ft
- ▲ High tide 5:24 pm 5.4 ft · coef. 92
↓ Falling The tide is falling. 3 h 13 min to low tide at 11:54 am.
Tide coefficient 97 for the 6:50 am high tide and 92 for the 5:24 pm high tide. Spring tides. The water rises and falls 2.3 ft between the highest high and the lowest low: an average 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 October 28 (5.4 ft) and the lowest, on May 18 (-0.6 ft).
Mixed: two high and two low tides a day, but of quite different heights.
Heights above NLLW. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. NLLW
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 27 (coefficient 109, 5.3 ft range). The smallest, on October 19 (coefficient 24, 2.3 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 5:57 am · 4:48 pm | High tide 6:50 am · 4.9 ft | Low tide 11:54 am · 3.1 ft | High tide 5:24 pm · 5.4 ft | — | Coef. 97 | 88% | Major periods 12:39 am · 1:11 pm | Medium |
| Fri 30 | 5:58 am · 4:47 pm | Low tide 12:39 am · 0.1 ft | High tide 7:44 am · 4.6 ft | Low tide 12:28 pm · 3.3 ft | High tide 5:58 pm · 5.2 ft | Coef. 83 | 80% | Major periods 1:43 am · 2:16 pm | Medium |
| Sat 31 | 5:58 am · 4:46 pm | Low tide 1:30 am · 0.4 ft | High tide 8:46 am · 4.3 ft | Low tide 1:06 pm · 3.5 ft | High tide 6:36 pm · 4.9 ft | Coef. 67 | 69% | Major periods 2:47 am · 3:18 pm | Medium |
| Sun 1 | 5:59 am · 4:45 pm | Low tide 2:28 am · 0.8 ft | High tide 10:04 am · 4.1 ft | Low tide 2:06 pm · 3.7 ft | High tide 7:28 pm · 4.4 ft | Coef. 50 | 58% | Major periods 3:48 am · 4:16 pm | Medium |
| Mon 2 | 6:00 am · 4:44 pm | Low tide 3:40 am · 1.3 ft | High tide 11:37 am · 4.0 ft | Low tide 4:25 pm · 3.6 ft | High tide 9:11 pm · 4.0 ft | Coef. 39 | Last quarter | Major periods 4:44 am · 5:10 pm | Medium |
| Tue 3 | 6:01 am · 4:43 pm | Low tide 5:01 am · 1.6 ft | High tide 12:43 pm · 4.1 ft | Low tide 6:37 pm · 3.1 ft | High tide 11:41 pm · 3.9 ft | Coef. 44 | 36% | Major periods 5:35 am · 5:59 pm | Medium |
| Wed 4 | 6:02 am · 4:42 pm | Low tide 6:18 am · 1.9 ft | High tide 1:23 pm · 4.3 ft | Low tide 7:36 pm · 2.5 ft | — | Coef. 51 | 26% | Major periods 6:22 am · 6:45 pm | Medium |
▲ high tide · ▼ low tide · heights above NLLW. Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Onjuku has no station of its own, so we use the tide at Katsuura (TICON-4), 7.3 mi away. On the open coast the difference is usually a few minutes and inches; inside estuaries, rivers and enclosed bays it can be much larger.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data
The sea at Onjuku
Sea stateSea state: slight
The waves you may find
- Most commonMost common1.8 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
Cross-onshore wind. The coast faces southeast and the wind comes in from the sea at an angle: a bit more surf at the shore and drift along the coast, toward land.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Friday 30: 7.6 ft with a period of 8 s, from the southeast (moderate).
Water temperature
Water temperature →The satellite measured 3.2 °F less 2 days ago than the model gives now: the water is probably colder than the forecast says.
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 74.8 °F by Wednesday 4.
Water warmer than normal for late October (+3.6 °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 8:40 am (local time).
Surf in Onjuku today
Surf today
Poor- 1.8–2.8 ft surf at the shore, a fun size for most surfers
- 2.7 ft swell at 5 s from the east-northeast, short: weak, messy waves
- Light offshore wind (6 mph): it holds up and grooms the waves
- Rising tide (high tide at 6:50 am)
- Light: First light 5:31 am · sunrise 5:57 am · sunset 4:48 pm · last light 5:14 pm
- Tide: high 6:50 am (4.9 ft), low 11:54 am (3.1 ft) and high 5:24 pm (5.4 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 76.5 °F: boardshorts or a swimsuit and a rash guard.
- Energy: 39 kJ · Low power
Today’s surf at a glance
The best window, 6:00 am to 7:00 am, has a good size and light offshore wind, though with a short-period swell. 1:00 pm to 5:00 pm can also work, with 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.
Diving in Onjuku today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (11:54 am): little current from 11:20 am to 12:20 pm
- 2.0 ft swell at 7 s from the east-northeast: some surge on the bottom
- Light onshore wind (6 mph)
- 0.8 mph current toward the north (model)
- Sun high: more light underwater
- Slack water today: low tide 11:54 pm (11:39 pm–12:10 am), high tide 6:50 am (6:30–7:10 am), low tide 11:54 am (11:20 am–12:20 pm) and high tide 5:24 pm (5:00–5:40 pm)
- Likely visibility: good. Swell (up to 2.8 ft at 6 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 76.5 °F: a 3 mm wetsuit.
- Snorkeling: better not, with these waves, wind or current.
- Night dive: dark from 5:14 pm. Waning gibbous (88%), rising at 6:57 pm: a bright night.
Your diving day at a glance
The best window, 10:40 am to 1:00 pm, combines slack water at low tide, light wind and the sun high, though with current. Also worth a look from 6:10 am to 7:40 am, with slack water at high tide and light wind, though with current.
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.
Dive sites, wrecks and dive shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Duck DiveDiving Shop 0.4 mi
- 千葉県勝浦市のダイビングショップ「かめはうす」 3.1 mi
- Dive Today 5.4 mi
- 勝浦ダイビングサービス 5.7 mi
- なめがわダイビングサービス 8.2 mi
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 in Onjuku
Now in Onjuku
- Low / high
- 50 / 64 °F
- Rain
- 0.13 in · 83%
- Clouds
- 100%
- Humidity
- 64%
- Dew pointDew point
- 48 °F
- Visibility
- 15 mi
- UV indexUV
- 1 · low
- Air qualityAir
- Fair · 34
- Saharan dust
- No
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady · now Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Steady now (+0.02 inHg in 3 hours). Over the next 48 hours: −0.48 inHg. Steady pressure: anglers expect normal activity. 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 am | 3:00 am | 6:00 am | 9:00 am | 12:00 pm | 3:00 pm | 6:00 pm | 9:00 pm |
|---|---|---|---|---|---|---|---|---|
| Sky | Mainly clear | Light drizzle | Mainly clear | Overcast | Light drizzle | Light drizzle | Mainly clear | Light drizzle |
| Temperature | 54° | 51° | 51° | 62° | 62° | 64° | 58° | 59° |
| Wind (mph) | 7 N | 6 NNE | 6 N | 10 ENE | 6 ENE | 2 NNE | 5 N | 4 SSW |
| Gusts | 13 | 11 | 13 | 22 | 16 | 10 | 8 | 6 |
| Waves | 3.7 ft | 3.5 ft | 3.4 ft | 3.7 ft | 3.6 ft | 3.7 ft | 3.9 ft | 3.9 ft |
| Rain | 0.00 in | 0.01 in | 0.00 in | 0.00 in | 0.01 in | 0.02 in | 0.00 in | 0.01 in |
- 9:00 am 62° 10 ENE 3.7 ft
- 12:00 pm 62° 6 ENE 3.6 ft
- 3:00 pm 64° 2 NNE 3.7 ft
- 6:00 pm 58° 5 N 3.9 ft
- 9:00 pm 59° 4 SSW 3.9 ft
- 12:00 am 61° 2 WSW 4.1 ft
- 3:00 am 60° 4 WNW 4.7 ft
- 6:00 am 58° 2 SE 5.6 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 50 / 64 °F | 10 mph NNE | 4.0 ft | 6:50 am · 5:24 pm | |
| Fri 30 | 58 / 73 °F | 11 mph SW | 7.6 ft | 7:44 am · 5:58 pm | |
| Sat 31 | 56 / 73 °F | 12 mph WNW | 6.7 ft | 8:46 am · 6:36 pm | |
| Sun 1 | 52 / 64 °F | 6 mph NE | 5.9 ft | 10:04 am · 7:28 pm | |
| Mon 2 | 55 / 67 °F | 18 mph WSW | 6.5 ft | 11:37 am · 9:11 pm | |
| Tue 3 | 54 / 70 °F | 8 mph NNE | 6.4 ft | 12:43 pm · 11:41 pm | |
| Wed 4 | 58 / 62 °F | 12 mph NNE | 6.4 ft | 1:23 pm | |
| Thu 5 | 53 / 63 °F | 11 mph NNW | 8.8 ft | 1:19 am · 1:53 pm | |
| Fri 6 | 53 / 70 °F | 10 mph N | 8.9 ft | 2:26 am · 2:20 pm | |
| Sat 7 | 55 / 59 °F | 11 mph NE | 8.1 ft | 3:18 am · 2:46 pm | |
| Sun 8 | 53 / 59 °F | 8 mph NNW | 6.0 ft | 4:04 am · 3:12 pm | |
| Mon 9 | 51 / 57 °F | 12 mph NNE | 7.1 ft | 4:46 am · 3:37 pm | |
| Tue 10 | 48 / 64 °F | 8 mph N | 6.0 ft | 5:26 am · 4:02 pm | |
| Wed 11 | 46 / 60 °F | 8 mph NNE | 5.4 ft | 6:04 am · 4:27 pm |
- Fri 30 Light rain 58° / 73° 7.6 ft
- Sat 31 Mainly clear 56° / 73° 6.7 ft
- Sun 1 Light drizzle 52° / 64° 5.9 ft
- Mon 2 Heavy drizzle 55° / 67° 6.5 ft
- Tue 3 Drizzle 54° / 70° 6.4 ft
- Wed 4 Drizzle 58° / 62° 6.4 ft
- Thu 5 Drizzle 53° / 63° 8.8 ft
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.
- The models Partly agree · medium confidence: unsure about rain today. See the models →
- Outlook The next few weeks look normal for the time of year. See the outlook →
- Normal Today, cooler than normal for late October (−4.3 °F; normal high: 68 °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 8:40 am (local time).
The sun in Onjuku
Sunrise and sunset
- First light 5:01 am
- Full dark 5:43 pm
- Civil dawn 5:31 am
- Civil dusk 5:14 pm
- Solar noon 11:22 am (41° high)
- Daylight 10 h 51 min (−2 min)
- Evening golden hour 4:12 pm
- Full dark 5:43 pm
Golden hour and the day-night map
Today the sun is 92,344,994 mi away and looks 32′ 11″ across.
The moon in Onjuku
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 12:39–2:39 am Major · the moon passes overhead · high activity
- 1:11–3:11 pm Major · the moon passes underfoot · high activity
- 8:53–9:53 am Minor · moonset · medium activity
- 6:27–7:27 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.
Where to fish in Onjuku
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
Gentle slopeThe bottom slopes gently: 16 ft deep 0.35 mi from shore and 33 ft at 0.85 mi.
From the shoreline (1.1 mi from Onjuku) out to sea, heading southeast.
How far from shore
- 16 ft deep0.35 mi
- 33 ft deep0.85 mi
- 66 ft deep1.2 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.35 mi): cast far from the beach and fish the high tide, when there is more water close in.
- Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
- Diving. Shallow near shore: you only reach 33 ft at 0.85 mi. For dives deeper than 33 ft, go by boat.
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.
Nearest lighthouse
Katuura 4.0 mi southwest
- Light
- 2 white flashes every 20 s · Fl(2) W 20s
- Range
- 22 nautical miles (25 mi)
- Light height
- 233 ft above sea level
- Tower height
- 69 ft
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Sources and licenses
Tides near OnjukuTides nearby
- Katsuura3.7 mi
- Isumi4.0 mi
- Ōhara4.6 mi
- Ichinomiya13 mi
- Kamogawa16 mi
- Higashiemi19 mi
- Ushigome19 mi
- Wada22 mi
- Katakai24 mi
- Sodegaura25 mi
Onjuku at a glance
- Town or city of about 7,523 people. Coordinates: 35.187° N, 140.358° E.
- It is 32 mi southeast of Chiba, the main place in Chiba. The sun rises 2 min earlier and sets at the same time than in Chiba.
- The nearest tide station, Katsuura, is 7.3 mi to the southwest.
- Its coast faces southeast.
- Beaches and harbors nearby: Iwawada Fishing Port (0.7 mi), Iwawada Gyokō (0.7 mi), Onjuku Fishing Port (0.8 mi), Hebara Fishing Port (2.4 mi).
Questions about OnjukuQuestions
What time is high tide today in Onjuku?
Today in Onjuku there are high tides at 6:50 am (4.9 ft) and 5:24 pm (5.4 ft) and low tide at 11:54 am. Tide coefficient 97.
What time is sunset today in Onjuku?
At 4:48 pm. There is light until the end of civil twilight, at 5:14 pm.
What time is sunrise tomorrow in Onjuku?
At 5:58 am. First light comes at 5:02 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 12:39–2:39 am, Minor 8:53–9:53 am, Major 1:11–3:11 pm, Minor 6:27–7:27 pm. Today's activity is medium.
What's the weather like today in Onjuku?
Light drizzle, from 50 °F to 64 °F, with a gentle breeze from the east-northeast (10 mph) and a 83% chance of rain.
How is the sea today in Onjuku?
Slight (Douglas 3): 3.7 ft waves with a period of 6.9 s from the east. The water is 76.6 °F.
When is the best time to visit Onjuku?
The best time to visit Onjuku is from July to August: highs of 81 °F to 85 °F, about 10 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: Katsuura station, with constants from TICON-4 (Hart-Davis, Dettmering and Seitz, 2025, SEANOE), licensed CC BY 4.0, via Slackwater database (changes). Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).