Surf Forecasts:
Shichirigahama surf forecast from 18 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 9AM (local time) - 7ft (2.1m), 16s period, S swell with 2,123 kJ wave energy.
Best Forecast Surf Conditions for Shichirigahama this week:
The most powerful waves expected at Shichirigahama in the next 16 days are 2.1m 16s and forecast to arrive on Wednesday (Aug 26) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Sunday (Aug 23) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9AM (Wed 26th Aug) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright crew, Rusty here with the lowdown on Shichigahama.
Honestly, the first week is a total dud. From Wednesday the 19th through Monday the 24th, it’s all tiny junk with onshore wind – not even worth waxing up. Nothing happening.
Then things get heavy, but not in a good way for paddling. Around Tuesday the 25th, the swell jumps to 5ft from the SSE, with strong energy. By Wednesday the 26th, we’re looking at 7ft and a massive energy spike. But the wind is howling onshore and cross-onshore, making it a choppy, blown-out mess. That’s kite territory, not surf territory.
Your one true standout is Saturday August 29th, first light. We’ve got a clean 5ft south swell, period 11 seconds – proper groundswell with good shape. Combined energy is still solid. But the kicker is the wind: dead calm, glassy, from the NNE at 3 mph. That’ll be buttery smooth. The report says “expect very good surf conditions.” This is your window. Just know this river break can be inconsistent and crowds pop in sometimes.
Sunday the 30th morning is still rideable with 4ft south swell and a light cross-offshore breeze – clean enough for a session. After that, the wind turns nasty again with big onshore blows and messy surf rolling in through early September.
That big pulse on September 1st? 7ft SSE swell with massive energy, but onshore winds at 25 mph. Leave that for the kiteboarders.
So here’s the plan: forget the first week. Your day is Saturday August 29th morning. Glassy, clean, 5ft south swell. Get it while it’s good.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 27°C on Wed morning, min 25°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Warm (max 28°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
AM | 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) | SE 6 | SSE 6 | SSW 8 | SSE 6 | SSW 9 | S 10 | SSW 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 9 | SSW 9 | SW 9 | SSE 15 | SSE 14 | SSE 16 | SSE 14 | SSE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 4 | 6 | 4 | 8 | 8 | 27 | 101 | 34 | 32 | 32 | 32 | 26 | 20 | 26 | 27 | 191 | 286 | 938 | 1121 | 811 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | cross-on | on | on | on | on | on | on | cross-on | glassy | off | cross-on | on | cross-on | on | on | on | on | on |
High Tide | 8:14PM1.50m | 10:09AM1.09m | 8:44PM1.45m | 9:20PM1.38m | 5:30PM1.29m | 10:31PM1.31m | 4:48PM1.36m | 00:49AM1.28m | 4:54PM1.41m | 2:21AM1.33m | 5:05PM1.44m | ||||||||||
Low Tide | 1:44PM0.84m | 3:29AM0.49m | 1:48PM0.98m | 4:58AM0.51m | 6:47AM0.47m | 7:34PM1.28m | 8:09AM0.39m | 9:21PM1.20m | 9:06AM0.32m | 9:56PM1.11m | 9:48AM0.27m | 10:20PM1.01m | |||||||||
 | |  |  |  |  | | |  | | | | | | | | | | | | | |
 | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — |
 | — | 6:27 | — | — | 6:25 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:19 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 28 | 27 |
Feels °C | 29 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 30 | 30 | 32 | 30 | 30 | 30 | 29 | 28 | 28 | 29 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSW 8 | SSW 9 | SE 11 | SSW 9 | SSW 9 | SSW 9 | SSW 4 | SSW 9 | SW 9 | SSW 9 | SW 9 | SSE 15 | SSE 14 | SSE 16 | SSE 14 | SSE 14 |
| kJ | 6 | 4 | 3 | 3 | 3 | 6 | 27 | 4 | 34 | 32 | 32 | 5 | 26 | 20 | 26 | 20 | 191 | 286 | 938 | 1121 | 811 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SSW 9 | S 10 | SE 11 | S 9 | SE 10 | S 4 | SE 10 | SSW 9 | SE 10 | SSE 4 | SSE 10 | SE 10 | SW 10 | SSE 18 | SW 10 | SSW 10 | S 16 |
| kJ | 4 | 4 | 4 | 4 | 8 | 8 | 4 | 2 | 4 | 4 | 4 | 32 | 4 | 2 | 10 | 17 | 87 | 257 | 17 | 10 | 651 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SW 8 | SSW 8 | SW 8 | SE 11 | SE 11 | SE 5 | SE 5 | S 9 | SE 10 | SE 11 | SE 10 | SE 11 | SE 12 | S 16 | SSE 17 | E 12 | SW 11 | ESE 14 | — | SSW 10 |
| kJ | 6 | 3 | 6 | 2 | 4 | 4 | 4 | 1 | 2 | 4 | 5 | 4 | 5 | 5 | 5 | 27 | 11 | 114 | 62 | — | 11 |
Wind waves Height (m) Direction Period (s) | — | S 2 | — | — | SSE 2 | SSE 5 | S 3 | S 9 | SSW 3 | S 5 | S 3 | SW 3 | ENE 2 | — | — | — | SSW 10 | SSW 11 | — | SW 10 | — |
| kJ | — | 1 | — | — | 1 | 6 | 1 | 101 | 7 | 11 | 8 | 4 | 1 | — | — | — | 38 | 45 | — | 85 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 81 | 81 | 58 | 20 | 81 | 80 | 80 | 81 | 80 | 22 | 81 | 22 | 20 | 20 | 20 | 22 | 80 | 10 | 10 | 487 | 10 |
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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