Shichirigahama Surf Break

Lat Long: 35.30° N 139.51° E

Shichirigahama Surf Forecast and Surf Report

Issued: 2 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Shichirigahama sea temperature is
27.2° C
0.3° 

Shichirigahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Shichirigahama surf forecast from 17 Aug 2026:

  • Most powerful swell: Monday 24 Aug, 9PM (local time) - 6ft (1.8m), 8s period, SW swell with 358 kJ wave energy.

Best Forecast Surf Conditions for Shichirigahama this week:

The most powerful waves expected at Shichirigahama in the next 16 days are 1.8m 8s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 9PM (Mon 24th Aug)6ft (1.8m) 8s

Table - best surf conditions forecast for Shichirigahama over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let's have a look at what's cooking for Shichigahama.

Right, let's be straight with you. The first week or so is looking pretty grim. We've got a real flat spell on our hands from now all the way through to the 23rd of August. There's nothing worth paddling out for; just tiny wind chop and poor conditions. You'd be better off cleaning the wax off your deck or going for a fish. It's a long, frustrating gap, but that's the way it is.

The first sniff of something real arrives on the morning of Monday the 25th of August. The swell is still tiny, just a 2ft groundswell pushing in from the SE, but the wind goes glassy calm. It's rideable but ordinary. Not the one to set the alarm for.

Now, here's where it gets interesting. The standout window is from Wednesday the 26th through to Friday the 28th of August. This is the best the forecast has to offer, and it's a proper big-wave event for experienced surfers only.

The star of the show is Shichigahama itself, a river break where consistent, long-period groundswell from the SSE is going to light it up. We're looking at waves building from 6ft on Wednesday morning to a solid 8ft on Thursday and peaking at a hefty 10ft on Friday. The swell energy is massive, hitting values like 1688 and climbing to a thumping 4355. This isn't for the faint-hearted; over 8ft, this is expert territory. The period is a very long 16 seconds, so these are proper, powerful lines. At a river mouth, this kind of long-period energy can set up some beautiful, walling rights and lefts. The wind plays ball beautifully, too. Wednesday morning has a light cross-offshore breeze from the east, making for clean, peeling faces. Then on Thursday, we get a proper offshore wind from the NNE, holding those 7ft to 8ft faces open for some deep barrels. It's going to be absolutely pumping, but also a serious challenge. Expect a crew, as crowds are sometimes a factor here.

Saturday the 29th is a write-off. The same massive 10ft swell is there, but a severe gale from the SSE blows it to pieces. That's kite-surfing weather, not surfing.

The energy settles by early September. Monday the 31st of August and Tuesday the 1st of September see the size drop to a much friendlier 3ft to 3ft, but with clean offshore winds again from the NE. It's a nice little window for a longboard or a fish after the chaos of the big days, but the real magic is that mid-week giant swell with the offshore winds.

So, to sum it up: sit tight through the flat spell. Your target is Wednesday the 26th through Friday the 28th of August for a big, expert-level swell with clean winds. That's the only real standout on offer.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Sun morning. Warm (max 27°C on Thu afternoon, min 24°C on Sun morning). Wind will be generally light.

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SSW
8
0.2
SSW
8
0.2
SSW
8
0.2
SSW
8
0.3
SE
7
0.3
SE
6
0.3
SE
6
0.2
SSW
8
0.2
SSE
6
0.3
SSW
9
0.5
S
10
0.5
S
9
0.5
S
10
0.7
SSW
11
0.5
SSW
10
0.5
SSW
10
0.4
SSW
9
0.4
SSW
9
1
S
4
1.3
SSW
5
Wave Graph
Metric surfscale
Energy kJ
14
7
6
6
7
6
6
6
4
17
50
44
54
101
57
55
35
32
36
86
Wind (km/h)
10
SSW
10
SE
5
SE
15
S
5
SSE
5
E
10
S
5
S
5
ESE
15
SSW
15
S
10
S
20
S
20
SSW
15
S
25
S
20
S
15
WSW
25
SSW
20
SSW
Wind State
on
cross
cross
on
glassy
glassy
on
on
cross
on
on
cross-on
on
on
on
on
on
cross-on
on
on
High Tide
7:19PM1.55m
7:52AM1.34m
7:45PM1.54m
8:48AM1.21m
8:14PM1.50m
10:09AM1.09m
8:44PM1.45m
9:20PM1.38m
5:30PM1.29m
10:31PM1.31m
4:48PM1.36m
00:49AM1.28m
Low Tide
1:41AM0.48m
1:24PM0.69m
2:29AM0.47m
1:44PM0.84m
3:29AM0.49m
1:48PM0.98m
4:58AM0.51m
6:47AM0.47m
7:34PM1.28m
8:09AM0.39m
9:21PM1.20m
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
light rain
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:01
5:03
5:03
5:05
5:05
5:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:29
6:28
6:27
6:25
6:23
6:22
6:22
 mm
2
4
1
11
Temp °C
27
26
26
27
26
27
27
26
27
27
26
27
27
26
27
27
26
25
24
25
Feels °C
29
30
30
29
29
30
28
29
30
29
28
28
27
27
28
27
27
27
24
25
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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