Surf Forecasts:
Yokohama Bay surf forecast from 5 Aug 2026:
- Best quality surf: Friday 7 Aug, 8PM (local time) - 1.5ft (0.4m), 19s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 9 Aug, 8PM (local time) - 2.5ft (0.8m), 16s period, SSW swell with 295 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 8PM (local time) - 1.5ft (0.5m), 11s period with SSW swell.
Best Forecast Surf Conditions for Yokohama Bay this week:
The surf forecast for Yokohama Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 8PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.5m and 5s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Yokohama Bay in the next 16 days are 0.8m 16s and forecast to arrive on Sunday (Aug 09) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 7s period and expected on Sunday (Aug 09) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 4th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 8PM (Fri 7th Aug) | 1.5ft (0.4m) 19s |
| Most Powerful | 8PM (Sun 9th Aug) | 2.5ft (0.8m) 16s |
Table - best surf conditions forecast for Yokohama Bay over the next 16 days.
The Lowdown
Alright, let’s talk about it in feet and degrees.
It’s a quiet start, no doubt. The first few days are small and not worth paddling out for. The action really starts to kick from Saturday the 8th of August through to Wednesday the 12th. That’s the sweet spot.
The best energy comes in on Saturday morning with a combined swell energy of 337 (moderate). We’re looking at a consistent 2 to 3 feet of swell out of the SSW, with a long period of 14 to 16 seconds. That’s proper groundswell. The wind is offshore from the ENE, moderate, keeping the faces clean. The water is about 80°F, which is normal for this time of year.
Yokohama Bay is the only break in the game. It’s a very consistent spot, exposed to the swell. The optimum direction is WNW, but the SSW swell will wrap in fine. The highlight is Saturday morning with 2 feet and 14 seconds, and Tuesday morning (11th August) with 3 feet and 15 seconds. Offshore wind, clean conditions, and good energy. That’s your window. Expect some company, it can get a few heads out there.
After the 12th, it drops off sharply. The swell gets smaller, the period shorter, and while the wind stays offshore, the quality slips to “surfable but ordinary” then “poor” through the middle of the second week. There’s a tiny bump on the 19th of August with a 2 foot west swell, but the wind is strong and the conditions are just average.
So, mark your calendar for the 8th to the 12th. That’s the run.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Fri afternoon, min 25°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 12 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 20 | SSW 19 | SSW 14 | SW 18 | SSW 17 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 75 | 87 | 94 | 88 | 86 | 81 | 80 | 138 | 77 | 99 | 148 | 175 | 154 | 202 | 132 | 102 | 288 | 188 | 234 | 246 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 5:50PM0.40m | 10:01AM0.53m | 11:19AM0.59m | 12:19PM0.66m | 1:10PM0.72m | 11:44PM0.19m | 1:55PM0.76m | 1:05AM0.21m | 2:35PM0.78m | 2:03AM0.25m | ||||||||||
Low Tide | 1:34AM0.09m | 2:18AM0.08m | 3:19AM0.06m | 4:31AM0.04m | 9:43PM0.19m | 5:40AM0.02m | 9:46PM0.17m | 6:41AM0.01m | 10:04PM0.15m | |||||||||||
 |  |  | | | | |  | | | |  | | | | | | | |  | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 25 | 27 | 28 | 25 | 27 | 28 | 25 | 27 | 28 | 25 | 27 | 28 | 26 |
Feels °C | 29 | 26 | 28 | 29 | 25 | 30 | 30 | 25 | 28 | 27 | 24 | 27 | 28 | 25 | 28 | 28 | 25 | 29 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | N 5 | NE 11 | NE 10 | SSW 15 | SSW 15 | SSW 14 | NE 8 | SSW 14 | NE 5 | SW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | ENE 7 | SSW 12 | SSW 16 | NE 7 | SSW 15 | NE 7 |
| kJ | 15 | 92 | 79 | 88 | 86 | 81 | 40 | 138 | 14 | 91 | 108 | 175 | 102 | 99 | 83 | 86 | 288 | 79 | 234 | 60 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SSW 11 | SSW 11 | S 12 | SSE 11 | SSW 14 | NNW 7 | SSW 14 | SSE 11 | SSW 19 | SW 18 | SW 18 | SSW 17 | SSW 13 | S 18 | SSW 12 | SSW 16 | SSE 10 | SSW 15 |
| kJ | 75 | 69 | 38 | 46 | 46 | 25 | 80 | 18 | 77 | 38 | 148 | 162 | 154 | 202 | 98 | 156 | 56 | 188 | 35 | 246 |
Swell 3 Height (m) Direction Period (s) | ENE 11 | SSW 15 | SSW 16 | SSE 12 | SSW 10 | SSW 10 | NNW 8 | S 11 | SSE 11 | SW 20 | SSE 11 | S 10 | ESE 7 | SSE 10 | SW 16 | SSW 16 | SSE 10 | SSW 12 | SSW 11 | SSE 9 |
| kJ | 46 | 87 | 94 | 49 | 18 | 19 | 19 | 21 | 39 | 99 | 39 | 17 | 9 | 19 | 132 | 102 | 18 | 81 | 42 | 32 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 5 | NE 6 | — | NE 8 | — | NE 6 | NE 6 | ENE 6 | NE 6 | ENE 7 | ENE 7 | NE 7 | NE 7 | — | NE 7 | — |
| kJ | — | — | — | — | 13 | 25 | — | 45 | — | 20 | 32 | 51 | 46 | 93 | 191 | 86 | 93 | — | 52 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Yokohama Bay Surf forecast
The above surf forecast table for Yokohama Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Yokohama Bay can be found by selecting the local surf guide option on the grey menu. Our Yokohama Bay 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 (Yokohama Bay) 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 Yokohama Bay 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.
Yokohama Bay is 24 km (15 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.
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