Surf Forecasts:
Shichirigahama surf forecast from 11 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 3AM (local time) - 5.5ft (1.7m), 15s period, SSE swell with 1,314 kJ wave energy.
Best Forecast Surf Conditions for Shichirigahama this week:
The most powerful waves expected at Shichirigahama in the next 16 days are 1.7m 15s and forecast to arrive on Saturday (Sep 19) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Friday (Sep 18) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Sat 19th Sep) | 5.5ft (1.7m) 15s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright, Rusty here. Let me break down what’s coming up. The first chunk, from September 12th through the 17th, is basically a flat spell. Tiny waves, weak energy, nothing you’d want to paddle out for. A real patience-tester, but that’s how it goes sometimes.
Things finally stir on Friday, September 18th at Shichirigahama. Morning shows a 3ft swell from the SE with a very long 17-second period and combined energy at 484 – that’s moderate. It’s a bit rough around the edges, but with a fresh offshore breeze from the N, it’ll be clean. That long period is a groundswell, so the river mouth setup should handle it well. By afternoon, it pushes to 4ft from the SE, period 16 seconds, energy up to 765. Still offshore, still clean.
Saturday the 19th steps it up. Morning brings 6ft from the SSE, 14-second period, energy at 1265 – strong. Offshore wind from the N keeps it clean, but at this size, it’s getting into expert territory. Afternoon drops to just over 5ft, still clean and solid.
Sunday the 20th and Monday the 21st sit in the 4ft to 5ft range, with moderate offshore breezes and clean conditions. Periods around 12 seconds mean decent shape. Energy is in the 464 to 646 range – solid moderate. Good, user-friendly waves for most.
Then the wheels come off. Tuesday the 22nd and Wednesday the 23rd bring strong onshore winds, with the 23rd seeing a gale from the SSW at 43 mph and an 8ft windswell with a poor 7-second period. Messy and dangerous. Stay out.
Now for the real show. Thursday, September 24th: morning delivers a 5ft swell from the SSE, 16-second period, combined energy at 1742 – strong. Offshore wind from the NE at 12 mph keeps it pristine. Marked as excellent for experienced surfers. That long-period groundswell with a clean offshore breeze at a river mouth? That’s the ticket. Afternoon is a touch bigger at 6ft but goes cross-shore, so the morning is your best bet.
Friday the 25th is the standout. Morning shows 8ft from the SSE, 16-second period, energy at 2821 (very strong), with a light cross-offshore breeze. Afternoon bumps to just over 8ft, energy hits 3386, light and clean. Both windows are excellent for experienced surfers. This is big, powerful stuff. Crowds are “sometimes” a thing here, so a Friday might help.
Saturday the 26th goes massive – 12ft from the SSE, still 16 seconds, energy over 5500. Very strong. Cross-offshore winds keep it clean, but this is only for the most seasoned locals. Sunday the 27th drops to 8ft with a fresh offshore breeze, still clean and powerful.
Water temp is about average for the time of year – nothing to write home about.
Bottom line: first week is a total loss. Second week, especially Thursday the 24th through Saturday the 26th of September, is where it’s at. My top pick is Friday the 25th at Shichirigahama – 8ft, 16-second groundswell from the SSE, with light, clean winds. That’s the one to lock in.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Fri night. Warm (max 27°C on Mon morning, min 20°C on Fri night). Winds increasing (light winds from the NE on Sun morning, fresh winds from the S by Mon afternoon). | Days 5-7 Weather SummaryHeavy rain (total 35mm), heaviest during Wed night. Warm (max 26°C on Mon night, min 21°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the N by Thu afternoon). | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SSE 8 | SE 8 | SSE 7 | SSE 7 | SSE 8 | SE 8 | ESE 8 | SSE 9 | SE 21 |
Wave Graph  | |||||||||||||||||||
 kJ | 19 | 18 | 18 | 9 | 5 | 19 | 14 | 17 | 15 | 29 | 27 | 21 | 19 | 21 | 26 | 17 | 6 | 8 | 71 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross | on | on | on | cross-on | glassy | on | off | off | off | off | off | off | off |
High Tide | 5:03AM1.54m | 5:25PM1.52m | 5:39AM1.55m | 5:43PM1.56m | 6:17AM1.53m | 6:04PM1.59m | 6:57AM1.46m | 6:27PM1.60m | 7:41AM1.37m | 6:53PM1.58m | 8:36AM1.26m | 7:20PM1.53m | |||||||
Low Tide | 11:05PM0.60m | 11:18AM0.46m | 11:30PM0.48m | 11:40AM0.54m | 11:59PM0.38m | 12:02PM0.63m | 00:31AM0.32m | 12:25PM0.73m | 1:08AM0.31m | 12:46PM0.84m | 1:50AM0.34m | 1:04PM0.96m | 2:44AM0.40m | ||||||
 |  |  |  |  |  |  | | |  | | | | | | |  | | | |
 | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — |
mm | 17 | 5 | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | 21 | 6 | 4 | — |
Temp °C | 20 | 20 | 22 | 22 | 23 | 24 | 24 | 27 | 27 | 26 | 25 | 25 | 25 | 23 | 23 | 22 | 21 | 22 | 22 |
Feels °C | 21 | 20 | 23 | 23 | 26 | 27 | 27 | 27 | 26 | 27 | 28 | 26 | 29 | 25 | 24 | 22 | 20 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SSE 8 | SE 8 | SSE 7 | SSE 7 | SSE 8 | SE 8 | ESE 8 | ESE 8 | SE 21 |
| kJ | 19 | 18 | 18 | 9 | 5 | 19 | 14 | 17 | 15 | 29 | 27 | 21 | 19 | 21 | 26 | 17 | 6 | 6 | 71 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SSE 7 | SSW 7 | SW 7 | S 7 | E 12 | S 7 | S 7 | S 7 | S 9 | SE 9 | E 13 | E 12 | SSE 8 | SSE 9 | SSE 8 |
| kJ | 4 | 4 | 4 | 3 | 5 | 5 | 2 | 1 | 11 | 1 | 1 | 1 | 2 | 3 | 13 | 3 | 6 | 8 | 7 |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | E 14 | E 13 | SE 9 | E 13 | E 12 | E 12 | E 15 | S 7 | S 7 | — | S 7 | — | S 8 | S 7 | E 12 | E 11 | E 8 |
| kJ | 1 | 1 | 4 | 4 | 3 | 3 | 3 | 3 | 4 | 1 | 1 | — | 1 | — | 1 | 1 | 3 | 2 | 5 |
Wind waves Height (m) Direction Period (s) | — | NNE 3 | NNE 2 | NNE 2 | — | — | — | — | S 4 | SSW 4 | — | S 3 | — | — | — | NNE 2 | NNE 3 | NNE 3 | NNE 3 |
| kJ | — | 1 | 1 | 1 | — | — | — | — | 13 | 6 | — | 2 | — | — | — | 1 | 5 | 6 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 54 | 54 | 58 | 34 | 20 | 20 | 58 | 22 | 81 | 22 | 20 | 22 | 20 | 20 | 54 | 54 | 78 | 466 | 225 |
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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