Surf Forecasts:
Shichirigahama surf forecast from 30 Aug 2026:
- Most powerful swell: Sunday 6 Sep, 3AM (local time) - 3.5ft (1.1m), 15s period, S swell with 517 kJ wave energy.
Best Forecast Surf Conditions for Shichirigahama this week:
The most powerful waves expected at Shichirigahama in the next 16 days are 1.1m 15s and forecast to arrive on Sunday (Sep 06) 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 0.6m 3s period and expected on Saturday (Sep 05) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Sun 6th Sep) | 3.5ft (1.1m) 15s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve gotta be straight with you – the next couple of weeks are a tough watch around Shichigahama. We’re looking at a long, slow start with barely a ripple.
We kick off on Sunday the 30th of August, and honestly, it’s flat. The water sits at a warm 82°, which is a touch warmer than normal for this time of year, but that’s the only good news. Tiny 1ft swell from the SSW with a weak 7-second period. Combined wave energy is a paltry 30 – that’s low. The morning wind is a light offshore from the NNE, so it looks clean, but there’s just no power. This flat spell drags on. Monday the 31st offers even less – 1.0ft. Tuesday the 1st of September, Wednesday the 2nd, Thursday the 3rd... it’s all tiny, messy, or onshore. Thursday afternoon gets windy from the S at 22 mph with a junky 4-second swell. Not even worth suiting up. Friday the 4th of September has a glassy morning, which is a tease, but still only 1ft. The combined energy sits at 47 – weak.
Then, finally, something changes. On Saturday the 5th of September, the afternoon shows a jump in period to 16 seconds, and combined energy hits 158. It’s still a small 1ft from the SSE, but a long-period groundswell that clean. It’s a tease of better things. The real action arrives on Sunday the 6th of September. We see a 4ft S swell with a 14-second period – proper long-period groundswell. Combined energy leaps to 491. The wind is a fresh offshore from the N at 22 mph. This is real surf. It’s a river mouth, so that long period should wrap in nicely. The swell stays solid into Monday the 7th of September, with 4ft from the S at 14 seconds and combined energy at 638. Offshore NNE winds in the morning keep it clean. This is the standout. The best of the whole run looks like Tuesday the 8th of September and Wednesday the 9th. Tuesday has 4ft from the S with an 11-second period, combined energy at 439, and gentle offshore NE winds. Clean, consistent, manageable. Wednesday holds 3ft to 4ft. The swell direction (S to SSE) matches the optimum SSW direction reasonably well, so the break lines up.
After that, it fades. Thursday the 10th of September still has some 4ft with offshore winds, but by Friday the 11th, the wind switches cross-onshore and it gets messy. The weekend of the 12th and 13th of September drops to 3ft and smaller. The final days, the 13th and 14th, offer small 2ft to 2ft SSW swell with fresh offshore winds, but it’s a clean, small end to the window. The lesson here? There’s a decent window from the 6th to the 10th of September. That’s your best shot. The rest is either flat or small with junky period. Keep an eye on the wind – when it’s offshore from the NNE or NE, the set-up cleans up nicely at this river break. Crowds are possible here – it’s a spot that draws attention when it’s on.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed night. Warm (max 28°C on Wed afternoon, min 22°C on Fri night). Winds decreasing (fresh winds from the S on Thu afternoon, calm by Fri morning). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSE 10 | SSW 9 | E 12 | SSW 9 | SSW 8 | SSW 8 | SE 9 | SSE 6 | SSE 6 | S 4 | SE 6 | SSW 9 | SW 11 | SSE 6 | SSE 6 | SSE 16 | S 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 18 | 11 | 11 | 9 | 15 | 14 | 15 | 14 | 13 | 41 | 33 | 27 | 44 | 16 | 28 | 18 | 14 | 13 | 89 | 391 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | off | off | cross | on | cross-on | on | on | on | on | on | glassy | cross | off | off | off | off |
High Tide | 6:18PM1.55m | 6:40AM1.50m | 6:40PM1.58m | 7:22AM1.41m | 7:05PM1.57m | 8:12AM1.30m | 7:32PM1.55m | 9:15AM1.18m | 7:59PM1.49m | 11:18AM1.09m | 8:28PM1.42m | 9:04PM1.32m | |||||||||
Low Tide | 12:07PM0.47m | 00:28AM0.45m | 12:30PM0.58m | 1:04AM0.40m | 12:53PM0.70m | 1:45AM0.39m | 1:14PM0.83m | 2:34AM0.42m | 1:27PM0.97m | 3:41AM0.47m | 12:52PM1.08m | 5:26AM0.51m | |||||||||
 |  |  | | | |  | |  | | |  | | | | |  |  |  | |  | |
 | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — |
 | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 2 | 3 | 1 | 2 | 15 |
Temp °C | 23 | 24 | 25 | 27 | 28 | 24 | 28 | 29 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 25 | 22 | 22 | 21 |
Feels °C | 24 | 26 | 29 | 29 | 30 | 25 | 30 | 32 | 31 | 30 | 30 | 29 | 28 | 27 | 28 | 31 | 32 | 27 | 22 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 9 | SSW 8 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSE 6 | SSE 6 | SE 10 | SE 6 | SSW 9 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | S 16 |
| kJ | 18 | 18 | 11 | 11 | 5 | 15 | 14 | 15 | 14 | 13 | 13 | 33 | 27 | 4 | 10 | 28 | 16 | 14 | 13 | 15 | 391 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SE 10 | SE 10 | SE 10 | ESE 7 | E 10 | SSW 8 | SSW 9 | SW 12 | SSW 8 | SSE 6 | SSW 9 | SSW 10 | SSW 10 | SSE 16 | SW 10 |
| kJ | 10 | 10 | 10 | 9 | 9 | 9 | 4 | 4 | 4 | 5 | 2 | 14 | 15 | 6 | 14 | 16 | 15 | 9 | 11 | 89 | 28 |
Swell 3 Height (m) Direction Period (s) | E 11 | SSW 6 | — | E 14 | E 13 | E 13 | E 12 | E 12 | E 11 | SE 10 | E 12 | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SW 11 | SSW 8 | SSW 9 | SSW 9 | SE 11 |
| kJ | 2 | 7 | — | 4 | 3 | 3 | 11 | 11 | 10 | 4 | 3 | 3 | 4 | 15 | 4 | 3 | 18 | 7 | 8 | 15 | 30 |
Wind waves Height (m) Direction Period (s) | NNE 2 | — | — | — | — | — | NNE 2 | — | — | — | SE 9 | — | S 4 | S 4 | SSW 4 | — | — | — | — | SSE 6 | N 3 |
| kJ | 1 | — | — | — | — | — | 1 | — | — | — | 41 | — | 14 | 44 | 16 | — | — | — | — | 39 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 58 | 20 | 60 | 142 | 54 | 58 | 58 | 42 | 20 | 20 | 64 | 34 | 90 | 515 | 90 | 22 | 65 | 54 | 42 | 142 | 142 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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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