Surf Forecasts:
Shichirigahama surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3PM (local time) - 3ft (0.9m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 12AM (local time) - 4ft (1.2m), 12s period, S swell with 407 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 12PM (local time) - 1.5ft (0.5m), 11s period with S swell.
Best Forecast Surf Conditions for Shichirigahama this week:
The surf forecast for Shichirigahama over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 12PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.5m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 1.2m 12s and forecast to arrive on Wednesday (Aug 26) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Saturday (Aug 29) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Thu 27th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 3PM (Tue 1st Sep) | 3ft (0.9m) 14s |
| Most Powerful | 12AM (Wed 26th Aug) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break it down.
First thing you gotta know: the start of this 16-day stretch is dead quiet. First real surf shows up on Tuesday the 1st of September, so you’re looking at a full week of flatness and junk onshores. Nothing to paddle out for.
Come Tuesday the 1st, Shichirigahama (river) fires up with a south groundswell around 3 feet at 14 seconds. That’s a long-period groundswell, so more power and better shape. Wind is cross-off in the afternoon, keeping it clean. Combined energy hits 461 (moderate), so there’s some push.
Wednesday morning the 2nd is a step up: 4 feet of south swell at 12 seconds, still cross-off breeze, energy at 499 (moderate). That’s a solid little window.
The big standout lands on Tuesday the 8th of September. Shichirigahama gets a clean 5 feet SSE swell with a 12-second pulse and a moderate offshore breeze. That’s clean, head-high-plus with real power. Combined energy hits 697 (strong). That’s your best bet—offshore wind, decent size, and the river mouth will handle the long period nicely.
Wednesday the 9th is worth a mention too: 6 feet south swell at 13 seconds, offshore wind, and combined energy at 1038 (strong to very strong). That’s expert territory—way too big for beginners. But if you know what you’re doing, it’s gonna be firing.
Bottom line: first week is a wash, second week has two hot windows. Tuesday the 8th is the one to circle—clean, solid SSE swell and offshore wind. Just keep in mind it’s more than a week out, so don’t book a flight just yet.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Thu morning. Warm (max 31°C on Wed afternoon, min 24°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sat morning. Warm (max 28°C on Fri afternoon, min 23°C on Sat morning). Wind will be generally light. | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 5 | SW 10 | S 11 | S 10 | SSW 5 | SSW 5 | SSW 6 | S 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | S 13 | S 12 | S 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 298 | 407 | 183 | 137 | 53 | 28 | 55 | 45 | 21 | 50 | 44 | 27 | 19 | 11 | 11 | 10 | 10 | 28 | 68 | 82 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | off | glassy | on | on | on | off | off | off | off | off | off | off | off | on | cross-off |
High Tide | 5:05PM1.44m | 3:19AM1.40m | 5:16PM1.46m | 4:04AM1.47m | 5:28PM1.47m | 4:44AM1.53m | 5:42PM1.49m | 5:22AM1.55m | 5:58PM1.52m | 6:00AM1.54m | 6:18PM1.55m | 6:40AM1.50m | 6:40PM1.58m | |||||||
Low Tide | 10:20PM1.01m | 10:23AM0.25m | 10:42PM0.89m | 10:52AM0.27m | 11:05PM0.77m | 11:19AM0.31m | 11:29PM0.65m | 11:43AM0.38m | 11:57PM0.54m | 12:07PM0.47m | 00:28AM0.45m | 12:30PM0.58m | 1:04AM0.40m | |||||||
 |  | | | |  |  |  |  | |  | | |  | |  |  | | |  | |
 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — |
 | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — |
mm | — | 1 | — | — | 1 | 9 | 4 | 1 | — | — | 1 | 5 | 1 | — | 1 | — | — | — | — | — |
Temp °C | 30 | 28 | 29 | 31 | 28 | 25 | 24 | 25 | 27 | 28 | 28 | 23 | 23 | 23 | 23 | 24 | 24 | 27 | 27 | 26 |
Feels °C | 30 | 29 | 32 | 32 | 29 | 26 | 27 | 26 | 28 | 30 | 32 | 24 | 23 | 24 | 24 | 25 | 25 | 30 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 11 | S 6 | S 6 | S 10 | S 9 | SSE 9 | SSW 6 | S 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | S 13 | S 12 | S 11 |
| kJ | 298 | 407 | 183 | 137 | 47 | 15 | 16 | 45 | 14 | 8 | 44 | 27 | 19 | 11 | 11 | 10 | 10 | 28 | 68 | 82 |
Swell 2 Height (m) Direction Period (s) | S 14 | E 13 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | S 11 | SSE 10 | SSE 9 | SE 15 | SSE 10 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 13 | SSW 12 |
| kJ | 243 | 3 | 48 | 47 | 31 | 28 | 55 | 9 | 8 | 8 | 9 | 11 | 12 | 10 | 10 | 10 | 10 | 10 | 16 | 28 |
Swell 3 Height (m) Direction Period (s) | E 13 | ESE 13 | SSW 5 | E 12 | S 10 | SW 10 | SSE 10 | SW 9 | SW 9 | E 12 | SE 13 | — | SSW 8 | SSW 8 | SSW 7 | — | SW 10 | SSW 14 | SSE 10 | S 16 |
| kJ | 3 | 33 | 9 | 3 | 19 | 25 | 18 | 3 | 3 | 11 | 7 | — | 12 | 11 | 11 | — | 4 | 19 | 9 | 20 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 5 | SW 4 | SSW 4 | SSW 5 | — | — | S 6 | SSW 5 | SSW 5 | — | NE 3 | NNE 3 | — | — | — | — | SSW 8 | SSW 4 | S 4 |
| kJ | 43 | 29 | 15 | 29 | 53 | — | — | 16 | 21 | 50 | — | 2 | 1 | — | — | — | — | 13 | 13 | 8 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 250 | 8 | 22 | 531 | 23 | 3 | 3 | 81 | 20 | 80 | 3 | 42 | 54 | 54 | 78 | 58 | 58 | 3 | 22 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Shichirigahama Surf forecast
The above surf forecast table for Shichirigahama provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shichirigahama can be found by selecting the local surf guide option on the grey menu. Our Shichirigahama surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Shichirigahama) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Shichirigahama may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Shichigahama is 6 km (4 miles) from the city of Chigasaki. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Chigasaki. Chigasaki has rooms for a wide range of budgets as well as car hire and transport links.
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