Surf Forecasts:
Shonan surf forecast from 26 Jul 2026:
- Best quality surf: Monday 27 Jul, 12AM (local time) - 1ft (0.3m), 11s period, SE swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 9PM (local time) - 3ft (0.9m), 6s period, SSW swell with 61 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 12AM (local time) - 1ft (0.3m), 11s period with SE swell.
Best Forecast Surf Conditions for Shonan this week:
The surf forecast for Shonan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 27) at 12AM. The primary swell is predicted to be 0.2m and 14s period with a secondary swell of 0.3m and 9s. Another secondary swell of 0.3m and 11s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Shonan in the next 16 days are 0.9m 6s and forecast to arrive on Friday (Jul 31) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 27th Jul) | 1ft (0.3m) 11s |
| Best Surf | 12AM (Mon 27th Jul) | 1ft (0.3m) 11s |
| Most Powerful | 9PM (Fri 31st Jul) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Shonan over the next 16 days.
The Lowdown
Alright folks, Rusty here with the look at Shonan in feet and miles per hour. It’s a slow start, then a big finish, but you gotta wait for it.
For the first part of the run, the surf is tiny. From now until early August, it’s mostly flat or ankle-high. The water temp is 81°, which is about normal for the season, no big deal.
Sunday the 26th has a 0.3ft SE swell with light cross-onshore wind. That little bump doesn’t change much for days. There’s a brief moment on the morning of Thursday the 30th where the wind goes glassy, but the swell is just 1ft with a short 7-second period—nothing to ride.
Things finally start to move around Monday the 3rd of August. A 2ft SE swell shows up with a good 15-second period, and the energy hits 121 (moderate). Winds are light and cross-shore. Still not great, but it’s a sign. On Tuesday the 4th, we get a 3ft ESE swell, also with a 16-second period, and the energy jumps to 463 (strong). Wind stays light and cross-shore. This is where it starts to get interesting.
The real standout is from Wednesday the 5th to Saturday the 8th of August. Wednesday morning brings a 4ft SE groundswell with a long 16-second period and clean cross-offshore wind from the NE. The energy is 651 (strong). It’s clean, lined up, and a good call for a surfer who wants shape without the chaos.
Thursday the 6th steps it up: a 5ft SE swell, still with a 17-second period, and a strong 19 mph NE cross-offshore wind. The energy is 1347 (very strong). This is proper stuff. Experienced surfers, this is your morning.
But the big one is Friday the 7th of August. We’ve got a 10ft SE swell, 17-second period, and clean cross-offshore wind from the north at 22 mph. The energy is through the roof at 4800 (very strong). This is for experts only. The swell is thick and powerful. At Shonan’s beach-reef setup, the long period will give it real punch, but it could also make for some fast, challenging waves. This is the heaviest day on the charts. Saturday the 8th is even bigger at 13ft, but the wind swings onshore from the east, turning it into a lumpy, bumpy mess. The energy is 10246 (extreme), but the quality is gone.
After that, the swell fades through Sunday and Monday, with onshore winds keeping things messy.
For the big-wave crew, Friday the 7th is your target. Thursday the 6th is a solid second choice with cleaner conditions and a bit less size. The rest is either flat or blown.
This is Rusty, out.
Short Range ForecastModerate rain (total 15mm), heaviest on Sun night. Warm (max 28°C on Mon afternoon, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 31°C on Fri afternoon, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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 15 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SSW 4 | SSW 4 | SSW 5 | SSW 6 | S 6 | S 6 | S 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 18 | 20 | 16 | 16 | 16 | 15 | 15 | 24 | 7 | 13 | 16 | 10 | 17 | 5 | 6 | 24 | 55 | 31 | 30 | 19 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | on | cross | cross-on | on | cross-off | cross-on | cross-on | cross | glassy | cross-on | cross-on | cross-on | on | cross | cross-off | on | cross-off |
High Tide | 4:44PM1.26m | 1:59AM1.32m | 5:06PM1.31m | 2:54AM1.37m | 5:29PM1.36m | 3:40AM1.42m | 5:51PM1.39m | 4:21AM1.46m | 6:13PM1.42m | 5:00AM1.48m | 6:35PM1.44m | 5:38AM1.47m | 6:56PM1.46m | ||||||||
Low Tide | 9:09PM1.09m | 9:39AM0.25m | 9:52PM1.04m | 10:16AM0.18m | 10:26PM0.97m | 10:50AM0.14m | 10:59PM0.90m | 11:21AM0.13m | 11:31PM0.83m | 11:50AM0.15m | 00:03AM0.75m | 12:19PM0.20m | 00:38AM0.68m | ||||||||
 |  |  | |  | | | | | | |  | | |  | | | | |  | | |
 | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | 2 | 7 | — | — | 3 | — | 2 | 1 | — | — | — | — | 1 | — | — | — | — | — | 1 | 1 |
Temp °C | 27 | 27 | 26 | 27 | 28 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 30 | 31 | 30 | 31 | 31 | 28 |
Feels °C | 30 | 30 | 31 | 29 | 30 | 30 | 28 | 29 | 29 | 29 | 28 | 30 | 30 | 29 | 31 | 33 | 34 | 34 | 34 | 34 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 15 | SE 11 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 5 | SSW 8 | SSW 7 | SSW 7 | SE 10 | SSW 7 | SSW 7 | SE 9 | SE 10 | S 6 | SE 11 | S 6 |
| kJ | 8 | 18 | 16 | 14 | 13 | 14 | 15 | 15 | 24 | 6 | 13 | 16 | 10 | 4 | 5 | 5 | 3 | 4 | 31 | 4 | 19 |
Swell 2 Height (m) Direction Period (s) | S 7 | SE 15 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSE 10 | SSW 8 | SE 9 | SE 9 | SE 9 | SE 12 | SE 9 | SE 9 | S 11 | — | SE 8 | S 8 | SSE 9 |
| kJ | 4 | 8 | 18 | 16 | 16 | 16 | 15 | 15 | 9 | 7 | 3 | 3 | 3 | 6 | 3 | 3 | 2 | — | 3 | 1 | 8 |
Swell 3 Height (m) Direction Period (s) | SE 11 | S 7 | SSE 14 | SE 14 | SE 14 | SSE 3 | SE 13 | SE 13 | SE 13 | SE 10 | SE 12 | SE 12 | SE 12 | S 8 | S 8 | SE 12 | S 8 | — | SE 11 | E 14 | SE 13 |
| kJ | 5 | 4 | 20 | 8 | 8 | 1 | 7 | 7 | 7 | 4 | 6 | 6 | 6 | 1 | 1 | 6 | 1 | — | 5 | 4 | 7 |
Wind waves Height (m) Direction Period (s) | — | S 2 | — | — | — | ESE 3 | E 8 | — | — | — | — | — | — | SSW 7 | SSW 4 | SSW 4 | SSW 5 | SSW 6 | — | S 6 | — |
| kJ | — | 1 | — | — | — | 2 | 5 | — | — | — | — | — | — | 17 | 5 | 6 | 24 | 55 | — | 30 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 28 | 0 | 59 | 26 | 59 | 26 | 28 | 47 | 26 | 87 | 59 | 84 | 87 | 86 | 86 | 95 | 7 | 26 | 84 | 59 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Shonan Surf forecast
The above surf forecast table for Shonan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shonan can be found by selecting the local surf guide option on the grey menu. Our Shonan 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 (Shonan) 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 Shonan 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.
Shonan is 4 km (2 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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