Kosai tides today
- Tide now 4.0 ft ↓ falling · low 1:38 pm (2.5 ft)
- Best time to fish 1:20–2:40 pm average day · 6/10
- Beach day 11:00 am–2:00 pm Poor beach day · 4/10
- Waves · water 1.9 ft · 73 °F slight · 6.0 s from the east-southeast
- Wind · air 5 mph · 63 °F from the E, gusts 12 · mainly clear
- Surf today 1.5–2.3 ft Poor day · 0/10 · 10:00 am–2:00 pm
- Sun 6:07 am–5:00 pm 10 h 52 min of daylight
- Moon 88% · 7:11 pm waning gibbous · rises at 7:11 pm
Today in Kosai there are high tides at 8:11 am (4.0 ft) and 6:54 pm (4.2 ft) and low tides at 1:32 am and 1:38 pm. Tide coefficient 87. Right now the tide is falling toward the low tide at 1:38 pm. The sun rises at 6:07 am and sets at 5:00 pm: 10 h 52 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 7:11 pm. Major solunar periods run from 12:51 am to 2:51 am and from 1:23 pm to 3:23 pm. The next spring tides arrive from October 27 to 29. The sea is slight, with 1.9 ft waves. There's a light breeze from the east (5 mph). Mainly clear, 63 °F.
Fishing in Kosai today
Best time to fish
Solunar activity today: medium- Low tide at 1:38 pm
- Major period 1:23–3:23 pm
- Rising pressure (+0.18 inHg in 24 h), light onshore wind (9 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: 87 (average tides)
Your day at a glance
The best window, 1:20 pm to 2:40 pm, combines the 1:38 pm low tide, a major period, a light onshore breeze and some swell, though with rising pressure. Also worth a try from 12:50 am to 1:30 am, with the 1:32 am low tide, a major period and some swell, though with rising pressure. Also worth a try from 6:40 pm to 7:50 pm, with the 6:54 pm high tide, moonrise and some swell, though with rising pressure.
Species with the most records nearby: striped mullet, Japanese amberjack, mahi-mahi and Japanese seabass. What you can catch
Beach day in Kosai
Is it a beach day?
1 good hour- Mostly sunny
- Cross-shore breeze (9 mph)
- UV 4 (moderate): SPF 30 sunscreen
- Water at 73 °F (nice)
- Low tide at 1:38 pm: more sand
- Feels like 67 °F: a bit cool
Today, hour by hour
- Swimming Use care · 2.7 ft
2.7 ft waves every 5 s: swim with care and stay where you can stand. Low rip current risk. Always follow the lifeguard's flags.
- Water 73 °F
Nice for swimming.
- Sun & sunscreen UV 4 · SPF 30
Max UV 4 (moderate): SPF 30 sunscreen, reapplied every 2 hours.
- Wind 9 mph
Cross-shore breeze (9 mph).
- Tide & sand 1:38 pm
Low tide at 1:32 am and 1:38 pm: that's when there's the most sand. High tide at 8:11 am and 6:54 pm.
The best window, 11:00 am to 2:00 pm, brings sunshine, little wind, water at 73 °F and low tide at 1:38 pm, though with cool air and some waves.
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 Kosai
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 女河浦海水浴場 3.2 mi · N
- 新居弁天海水浴場 3.9 mi · E
- Restrooms
- Parking
- 弁天島海水浴場 4.7 mi · E
- Restrooms
- Showers
- 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 Kosai
Webcams provided by windy.com — add a webcam
Tides in Kosai
Today's high and low tides
- ▼ Low tide 1:32 am 0.2 ft
- ▲ High tide 8:11 am 4.0 ft · coef. 87
- ▼ Next low tide 1:38 pm 2.5 ft
- ▲ High tide 6:54 pm 4.2 ft · coef. 82
↓ Falling The tide is falling. 4 h 52 min to low tide at 1:38 pm.
Tide coefficient 87 for the 8:11 am high tide and 82 for the 6:54 pm high tide. Average coefficient. The water rises and falls 3.9 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 14 (4.4 ft) and the lowest, on December 25 (-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 99, 3.9 ft range). The smallest, from October 18 to 19 (coefficient 25, 1.8 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 | 6:07 am · 5:00 pm | Low tide 1:32 am · 0.2 ft | High tide 8:11 am · 4.0 ft | Low tide 1:38 pm · 2.5 ft | High tide 6:54 pm · 4.2 ft | Coef. 87 | 88% | Major periods 12:51 am · 1:23 pm | Medium |
| Fri 30 | 6:08 am · 4:59 pm | Low tide 2:19 am · 0.3 ft | High tide 9:06 am · 3.8 ft | Low tide 2:21 pm · 2.7 ft | High tide 7:32 pm · 4.0 ft | Coef. 74 | 80% | Major periods 1:55 am · 2:27 pm | Medium |
| Sat 31 | 6:09 am · 4:58 pm | Low tide 3:10 am · 0.5 ft | High tide 10:13 am · 3.5 ft | Low tide 3:17 pm · 2.8 ft | High tide 8:20 pm · 3.7 ft | Coef. 60 | 69% | Major periods 2:59 am · 3:30 pm | Medium |
| Sun 1 | 6:10 am · 4:57 pm | Low tide 4:10 am · 0.8 ft | High tide 11:42 am · 3.3 ft | Low tide 4:44 pm · 2.8 ft | High tide 9:35 pm · 3.3 ft | Coef. 46 | 58% | Major periods 4:00 am · 4:28 pm | Medium |
| Mon 2 | 6:11 am · 4:56 pm | Low tide 5:23 am · 1.0 ft | High tide 1:17 pm · 3.3 ft | Low tide 6:50 pm · 2.6 ft | High tide 11:30 pm · 3.1 ft | Coef. 41 | Last quarter | Major periods 4:56 am · 5:22 pm | Medium |
| Tue 3 | 6:12 am · 4:55 pm | Low tide 6:46 am · 1.2 ft | High tide 2:15 pm · 3.4 ft | Low tide 8:17 pm · 2.2 ft | — | Coef. 45 | 36% | Major periods 5:47 am · 6:11 pm | Medium |
| Wed 4 | 6:13 am · 4:54 pm | High tide 1:22 am · 3.1 ft | Low tide 8:06 am · 1.3 ft | High tide 2:52 pm · 3.5 ft | Low tide 9:08 pm · 1.7 ft | Coef. 56 | 26% | Major periods 6:34 am · 6:57 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
Kosai has no station of its own, so we use the tide at Maisaka (TICON-4), 5.1 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 Kosai
Sea stateSea state: slight
The waves you may find
- Most commonMost common1.0 ft
- Significant1.9 ft
- Highest expectedHighest4.0 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 4.0 ft. Before heading out, expect waves of up to 4.0 ft.
Wind on the coast and offshore
Cross-shore wind. The coast faces south and the wind blows along the shore: drift and current run parallel to the beach.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Monday 2: 4.9 ft with a period of 8 s, from the south (moderate).
Water temperature
Water temperature →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 71.4 °F by Wednesday 4.
Water warmer than normal for late October (+1.2 °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 8:47 am (local time).
Surf in Kosai today
Surf today
Poor- 1.5–2.3 ft surf at the shore, a fun size for most surfers
- 1.8 ft swell at 5 s from the east-southeast, short: weak, messy waves
- Light cross-shore wind (8 mph): a bit of chop
- Falling tide (low tide at 1:38 pm)
- Light: First light 5:41 am · sunrise 6:07 am · sunset 5:00 pm · last light 5:25 pm
- Tide: low 1:32 am (0.2 ft), high 8:11 am (4.0 ft), low 1:38 pm (2.5 ft) and high 6:54 pm (4.2 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 73.0 °F: a rash guard or a neoprene top.
- Energy: 15 kJ · Low power
Today’s surf at a glance
The best window is 10:00 am to 2:00 pm, 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 Kosai today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (8:11 am): little current from 7:40 am to 8:40 am
- 1.4 ft swell at 5 s from the east-southeast: barely any surge
- Light cross-shore wind (4 mph)
- 0.2 mph current toward the west, weak (model)
- Daylight
- Slack water today: low tide 1:32 am (1:10–1:50 am), high tide 8:11 am (7:40–8:40 am), low tide 1:38 pm (1:00–2:10 pm) and high tide 6:54 pm (6:30–7:20 pm)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 73.0 °F: a 3 mm wetsuit.
- Snorkeling: doable, with some waves or wind.
- Night dive: dark from 5:25 pm. Waning gibbous (88%), rising at 7:11 pm: a bright night.
Your diving day at a glance
The best window, 7:20 am to 9:30 am, combines slack water at high tide, little swell, light wind and weak current. Also good from 12:30 pm to 2:30 pm, with slack water at low tide, light wind, weak current and the sun high.
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
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 Kosai
Now in Kosai
- Low / high
- 50 / 68 °F
- Rain
- 0.00 in · 0%
- Clouds
- 23%
- Humidity
- 64%
- Dew pointDew point
- 50 °F
- Visibility
- 15 mi
- UV indexUV
- 2 · low
- Air qualityAir
- Fair · 23
- Saharan dust
- No
Pressure and fishing
- ↗ RisingRising · now Anglers say fish bite less for a while
- → SteadySteady Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Rising now (+0.05 inHg in 3 hours). Over the next 48 hours: −0.33 inHg. Rising pressure: anglers say fish bite less for a while. 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 | Clear | Clear | Clear | Mainly clear | Mainly clear | Partly cloudy | Overcast | Overcast |
| Temperature | 50° | 51° | 53° | 63° | 68° | 67° | 61° | 62° |
| Wind (mph) | 5 NW | 2 NNW | 1 ENE | 5 E | 9 ESE | 8 ESE | 4 E | 6 NE |
| Gusts | 11 | 5 | 4 | 13 | 20 | 19 | 6 | 11 |
| Waves | 1.7 ft | 1.5 ft | 1.5 ft | 2.0 ft | 2.7 ft | 2.6 ft | 2.1 ft | 1.7 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 am 63° 5 E 2.0 ft
- 12:00 pm 68° 9 ESE 2.7 ft
- 3:00 pm 67° 8 ESE 2.6 ft
- 6:00 pm 61° 4 E 2.1 ft
- 9:00 pm 62° 6 NE 1.7 ft
- 12:00 am 61° 6 NE 1.6 ft
- 3:00 am 62° 6 NE 1.6 ft
- 6:00 am 60° 3 N 1.6 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 50 / 68 °F | 9 mph E | 2.7 ft | 8:11 am · 6:54 pm | |
| Fri 30 | 60 / 70 °F | 6 mph N | 3.2 ft | 9:06 am · 7:32 pm | |
| Sat 31 | 56 / 69 °F | 15 mph WNW | 3.3 ft | 10:13 am · 8:20 pm | |
| Sun 1 | 52 / 66 °F | 10 mph WNW | 4.5 ft | 11:42 am · 9:35 pm | |
| Mon 2 | 49 / 65 °F | 8 mph N | 4.9 ft | 1:17 pm · 11:30 pm | |
| Tue 3 | 55 / 69 °F | 13 mph WNW | 4.7 ft | 2:15 pm | |
| Wed 4 | 53 / 66 °F | 9 mph WNW | 3.6 ft | 1:22 am · 2:52 pm | |
| Thu 5 | 57 / 67 °F | 5 mph WNW | 5.6 ft | 2:50 am · 3:22 pm | |
| Fri 6 | 54 / 69 °F | 16 mph WNW | 6.0 ft | 3:54 am · 3:49 pm | |
| Sat 7 | 51 / 64 °F | 11 mph NW | 6.5 ft | 4:45 am · 4:14 pm | |
| Sun 8 | 53 / 59 °F | 6 mph NW | 5.3 ft | 5:29 am · 4:40 pm | |
| Mon 9 | 45 / 62 °F | 12 mph WNW | 5.7 ft | 6:10 am · 5:05 pm | |
| Tue 10 | 44 / 59 °F | 13 mph WNW | 5.1 ft | 6:48 am · 5:30 pm | |
| Wed 11 | 47 / 61 °F | 12 mph WNW | 4.3 ft | 7:25 am · 5:55 pm |
- Fri 30 Light rain 60° / 70° 3.2 ft
- Sat 31 Mainly clear 56° / 69° 3.3 ft
- Sun 1 Overcast 52° / 66° 4.5 ft
- Mon 2 Light rain 49° / 65° 4.9 ft
- Tue 3 Overcast 55° / 69° 4.7 ft
- Wed 4 Light drizzle 53° / 66° 3.6 ft
- Thu 5 Light drizzle 57° / 67° 5.6 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 tomorrow. See the models →
- Outlook The next few weeks look normal for the time of year. See the outlook →
- Normal Today, normal highs for late October (69 °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 8:47 am (local time).
The sun in Kosai
Sunrise and sunset
- First light 5:12 am
- Full dark 5:55 pm
- Civil dawn 5:41 am
- Civil dusk 5:25 pm
- Solar noon 11:34 am (42° high)
- Daylight 10 h 52 min (−2 min)
- Evening golden hour 4:25 pm
- Full dark 5:55 pm
Golden hour and the day-night map
Today the sun is 92,344,803 mi away and looks 32′ 11″ across.
The moon in Kosai
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 12:51–2:51 am Major · the moon passes overhead · high activity
- 1:23–3:23 pm Major · the moon passes underfoot · high activity
- 9:03–10:03 am Minor · moonset · medium activity
- 6:41–7:41 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 Kosai
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 渡船乗場 3.6 mi
- Jetty 4.3 mi
- Jetty 4.6 mi
- 浜名湖フィッシングリゾート 5.3 mi
- Boat ramp 5.0 mi
- Boat ramp 6.8 mi
- Boat ramp 6.9 mi
- 新居マリーナ 2.4 mi
- ヤマハマリーナ浜名湖 3.8 mi
- 浜名湖つりセンター 3.0 mi
- 大橋屋 3.2 mi
- 今切ショップ 4.1 mi
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 0.45 mi from shore and 33 ft at 0.7 mi.
From the shoreline (1.6 mi from Kosai) out to sea, heading south.
How far from shore
- 16 ft deep0.45 mi
- 33 ft deep0.7 mi
- 66 ft deep1.4 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.45 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 0.7 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
Maisaka Lighthouse 5.3 mi east
- Light
- A white flash every 15 s · Fl W 15s
- Range
- 17 nautical miles (20 mi)
- Light height
- 121 ft above sea level
- Tower height
- 92 ft
- Built
- 1964
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near KosaiTides nearby
- Arai2.8 mi
- Toyohashi9.1 mi
- Hamamatsu12 mi
- Tahara15 mi
- Iwata19 mi
- Gamagōri19 mi
- Nishio29 mi
- Minamichita29 mi
- Ishiki30 mi
- Hekinan33 mi
Kosai at a glance
- Town or city of about 59,770 people. Coordinates: 34.701° N, 137.523° E.
- It is 47 mi west of Yaizu, the main place in Shizuoka. The sun rises 3 min later and sets 3 min later than in Yaizu.
- The nearest tide station, Maisaka, is 5.1 mi to the east.
- Its coast faces south.
Questions about KosaiQuestions
What time is high tide today in Kosai?
Today in Kosai there are high tides at 8:11 am (4.0 ft) and 6:54 pm (4.2 ft) and low tides at 1:32 am and 1:38 pm. Tide coefficient 87.
What time is sunset today in Kosai?
At 5:00 pm. There is light until the end of civil twilight, at 5:25 pm.
What time is sunrise tomorrow in Kosai?
At 6:08 am. First light comes at 5:13 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 12:51–2:51 am, Minor 9:03–10:03 am, Major 1:23–3:23 pm, Minor 6:41–7:41 pm. Today's activity is medium.
What's the weather like today in Kosai?
Overcast, from 50 °F to 68 °F, with a light breeze from the east (5 mph) and a 0% chance of rain.
How is the sea today in Kosai?
Slight (Douglas 3): 1.9 ft waves with a period of 6.0 s from the east-southeast. The water is 73.0 °F.
When is the best time to visit Kosai?
The best time to visit Kosai is in May and from August to October: highs of 73 °F to 87 °F, about 11 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: Maisaka 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).