Surf Forecasts:
Shichirigahama surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 6AM (local time) - 1.5ft (0.5m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 3AM (local time) - 5ft (1.6m), 14s period, SSE swell with 1,045 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 6AM (local time) - 1.5ft (0.5m), 16s period with SSE 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 Monday (Aug 24) at 6AM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.5m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 1.6m 14s and forecast to arrive on Tuesday (Aug 25) at 3AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 24th Aug) | 1.5ft (0.5m) 16s |
| Best Surf | 6AM (Mon 24th Aug) | 1.5ft (0.5m) 16s |
| Most Powerful | 3AM (Tue 25th Aug) | 5ft (1.6m) 14s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright, let’s break it down. Rusty here.
First week and a half is a total bust. From Sunday August 23rd right through the end of August, there’s nothing doing. Swell is tiny, wind is junk, it’s all onshore slop. You’re looking at a gap of about nine days with no real surf.
Things finally turn around on Tuesday morning, September 1st, at Shichirigahama (Shichigahama). This river break starts showing some life. Swell picks up to about 4ft out of the south, period at 14 seconds—that’s proper groundswell with good energy behind it (576). Wind is light offshore from the northeast, so the waves will be clean and lined up. Good call for intermediates.
Wednesday September 2nd keeps that same size and direction—4ft south swell, 14-second period, combined energy at 597. Wind stays offshore from the north-northeast at about 16 mph, a little breezier but still clean. The sets will be spaced out, making it easier to get out back.
Thursday September 3rd is the real standout. Morning and afternoon both fire. You’ve got around 4ft of SSW swell, period going from 14 seconds up to 15 seconds in the afternoon—that’s long-period groundswell with serious push. Combined energy climbs to 704 then 814. Wind is strong offshore from the northeast at 16 mph, so the surf will be groomed and glassy. For a river break, this longer period is a bonus—shapes up really well. Crowds can show up here sometimes, so plan accordingly.
Friday September 4th is still rideable—4ft SSW swell, 14-second period—but the wind cranks to 19 mph offshore in the morning, getting fresh. Afternoon goes cross-off from the east-northeast, still clean but not as crisp. Energy stays high (917 and 965), just not the same quality as Thursday.
Then it all falls apart. Saturday September 5th sees a big 7ft SSW swell roll in, but the wind goes nuts—28 mph cross-shore from the east-southeast, then 34 mph cross-onshore. That’s blown out, choppy, and way too big for anyone but experts. Combined energy hits 2792, which is strong, but conditions are a mess. The rest of the outlook is small, onshore junk.
Water temp is around 81°F, about normal for this time of year.
So here’s the take: Thursday September 3rd at Shichirigahama is your best bet. Wednesday and Tuesday are solid backups. Everything before that, don’t bother.
Keep an eye on the forecast, things can shift. Rusty out.
Short Range ForecastMostly dry. Warm (max 29°C on Tue morning, min 25°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the S by Tue afternoon). | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Fri morning. Warm (max 29°C on Wed afternoon, min 23°C on Thu night). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Fri night). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 9 | SE 13 | SE 13 | SSE 18 | SSE 17 | SSE 14 | SSE 13 | S 13 | S 13 | S 12 | SSW 13 | SSW 12 | SSW 11 | S 8 | S 8 | S 8 | SSW 8 | SSW 10 | SSW 10 | S 9 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 25 | 27 | 82 | 260 | 486 | 756 | 722 | 653 | 560 | 276 | 786 | 161 | 84 | 51 | 50 | 51 | 109 | 71 | 102 | 60 | 36 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | on | on | on | on | on | on | on | on | on | cross-on | on | cross-on | off | on | off | off | cross-off | off |
High Tide | 4:48PM1.36m | 00:49AM1.28m | 4:54PM1.41m | 2:21AM1.33m | 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 | ||||||||
Low Tide | 9:21PM1.20m | 9:06AM0.32m | 9:56PM1.11m | 9:48AM0.27m | 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 | ||||||||
 | |  |  | |  | | | | | | |  | |  |  | |  |  | | | |
 | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — |
 | — | 6:22 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 6 | 6 | — | 1 | — | — | 1 |
Temp °C | 28 | 27 | 26 | 27 | 28 | 27 | 29 | 29 | 27 | 28 | 29 | 28 | 27 | 28 | 27 | 24 | 26 | 26 | 27 | 27 | 25 |
Feels °C | 31 | 29 | 30 | 29 | 30 | 29 | 30 | 29 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 27 | 29 | 30 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 8 | SE 13 | SSE 18 | SSE 13 | SSE 14 | SSE 13 | S 13 | S 13 | S 12 | SSE 9 | SSW 12 | S 8 | S 8 | S 8 | S 8 | SW 11 | SSW 10 | SSW 10 | S 9 | S 8 |
| kJ | 25 | 14 | 82 | 260 | 373 | 756 | 722 | 653 | 560 | 276 | 32 | 161 | 50 | 51 | 50 | 51 | 31 | 71 | 102 | 60 | 36 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 13 | SSW 8 | SSE 12 | SSE 17 | S 16 | S 17 | E 13 | E 13 | SSW 14 | ESE 12 | SSE 9 | SSW 11 | SSW 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 11 | SSE 11 | SSE 10 |
| kJ | 4 | 27 | 14 | 133 | 486 | 438 | 217 | 3 | 3 | 118 | 27 | 32 | 84 | 43 | 9 | 9 | 9 | 8 | 11 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 10 | SSE 18 | SSE 15 | ESE 12 | E 15 | E 14 | ESE 13 | ESE 13 | SE 10 | E 12 | E 11 | S 10 | SSE 10 | SW 9 | SE 14 | SE 15 | SE 13 | S 13 | SE 9 | SSE 6 |
| kJ | 7 | 4 | 31 | 84 | 28 | 17 | 4 | 35 | 33 | 25 | 25 | 2 | 16 | 18 | 14 | 8 | 8 | 7 | 3 | 3 | 4 |
Wind waves Height (m) Direction Period (s) | — | S 4 | — | — | SSW 3 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 13 | SSW 5 | — | — | SW 3 | SW 3 | SSW 8 | SSW 4 | — | — | — |
| kJ | — | 1 | — | — | 3 | 13 | 9 | 28 | 22 | 5 | 786 | 40 | — | — | 3 | 2 | 109 | 9 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 54 | 64 | 10 | 13 | 81 | 10 | 10 | 515 | 10 | 10 | 515 | 23 | 23 | 10 | 8 | 3 | 10 | 3 | 0 | 3 | 4 |
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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