Surf Forecasts:
Oiso Jetty surf forecast from 4 Aug 2026:
- Best quality surf: Friday 7 Aug, 6AM (local time) - 7ft (2.2m), 15s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 7.5ft (2.3m), 15s period, SSE swell with 2,432 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 6AM (local time) - 7ft (2.2m), 15s period with S swell.
Best Forecast Surf Conditions for Oiso Jetty this week:
The surf forecast for Oiso Jetty over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 07) at 6AM. The primary swell is predicted to be 2.2m and 15s period with a secondary swell of 1.0m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Oiso Jetty in the next 16 days are 2.3m 15s and forecast to arrive on Wednesday (Aug 05) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Aug 05) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 7th Aug) | 7ft (2.2m) 15s |
| Best Surf | 6AM (Fri 7th Aug) | 7ft (2.2m) 15s |
| Most Powerful | 12PM (Wed 5th Aug) | 7.5ft (2.3m) 15s |
Table - best surf conditions forecast for Oiso Jetty over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it.
We're looking at Oiso Jetty, and the first thing I gotta tell you is that the surf window kicks off on Tuesday the 4th of August, but it's a real mixed bag, and things don't really fire up until later in the week. The water temp is sitting at 82°, which is a touch warmer than normal for this time of year, so the wetsuit can stay in the car.
The first session to look at is Tuesday morning. We've got a clean 5 ft swell coming from the SE with a solid 17-second period. That's a proper groundswell, and it's packing some serious energy. The wind is a cross-off from the NE at 16 mph, which should keep the surface glassy. The jetty can handle a long-period SE swell, and with the water being warm, it's a decent start. But the quality is only marginal, and crowds are possible at this spot.
Wednesday morning is the real standout here. The swell jumps to 7 ft from the SSE, period still a long 16 seconds, and the energy is pumping. The wind is a cross-off from the NNE at 16 mph, keeping those waves clean. This is the best on offer in the whole run. It's a sizeable groundswell, pushing past 5 ft, so it's not for beginners, but for an intermediate surfer with a bit of bottle, this is the session to paddle out for. The jetty is fairly exposed to that SSE direction, so you'll get the sets.
The rest of the week is a slow fade. Thursday and Friday still have decent size, around 7 ft to 7 ft, but the winds turn more cross-on and onshore, making it choppy. The energy stays high, but the quality drops off. By Saturday morning, it's down to 5 ft and the winds are light cross-onshore, just making it a bit messy.
Then we hit a long dry spell. From Sunday the 9th onwards, the swell drops steadily. We get a few days of clean, cross-off winds in the middle of the second week, but the swell is tiny, only 3 ft to 2 ft. The energy is weak. There's just not enough push to make it worthwhile. The setup looks more interesting for kite surfing than paddle surfing during those light wind days. The forecast stays flat right through to the 19th of August, with no real surfable waves on offer. So, a bit of a bummer for the long run, but that Wednesday morning is the one to circle.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Warm (max 30°C on Thu afternoon, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Warm (max 30°C on Sun afternoon, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 17 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1094 | 1464 | 2107 | 2379 | 2414 | 1835 | 1665 | 2012 | 1972 | 1881 | 1739 | 1189 | 1060 | 1030 | 874 | 899 | 534 | 674 | 499 | 425 | 171 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross | cross | on | cross | cross | on | glassy | cross-on | cross-on | glassy | cross | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:05PM1.45m | 8:47AM1.18m | 8:33PM1.43m | 10:12AM1.09m | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | ||||||||
Low Tide | 1:44PM0.55m | 2:41AM0.50m | 2:14PM0.72m | 3:38AM0.47m | 2:45PM0.88m | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | ||||||||
 | |  |  | | | |  |  | | | | | |  | | | | | | | |
 | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — |
 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | 1 | 3 | — | — | 1 | — | — | 1 | — | — | — | — | — | 1 |
Temp °C | 28 | 29 | 24 | 28 | 29 | 27 | 29 | 30 | 27 | 29 | 29 | 27 | 28 | 29 | 26 | 29 | 30 | 26 | 28 | 29 | 26 |
Feels °C | 26 | 27 | 23 | 28 | 30 | 29 | 31 | 33 | 32 | 31 | 32 | 31 | 31 | 31 | 31 | 29 | 30 | 25 | 25 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SE 17 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 15 |
| kJ | 1094 | 1464 | 2107 | 2379 | 2414 | 1835 | 1665 | 2012 | 1972 | 1881 | 1739 | 1189 | 1060 | 1030 | 874 | 899 | 534 | 674 | 499 | 425 | 171 |
Swell 2 Height (m) Direction Period (s) | E 14 | E 13 | — | — | — | — | E 10 | ESE 10 | ESE 10 | ESE 10 | SE 9 | SE 9 | ESE 12 | ESE 12 | ESE 12 | ESE 16 | SW 16 | SE 8 | SE 8 | SE 8 | S 13 |
| kJ | 4 | 3 | — | — | — | — | 53 | 114 | 111 | 151 | 263 | 297 | 13 | 14 | 30 | 48 | 267 | 35 | 17 | 10 | 125 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | E 15 | SE 17 | ESE 16 | SSE 8 | — | SSE 9 | ESE 13 | ESE 13 | S 13 | ESE 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | 12 | 25 | 114 | — | 31 | 17 | 18 | 31 | 17 |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | — | NNE 4 | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | ENE 3 | NE 4 | NE 3 | NNE 4 |
| kJ | 7 | — | — | 22 | — | — | — | — | — | — | — | — | — | — | — | — | 110 | 2 | 10 | 7 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 121 | 34 | 463 | 460 | 34 | 12 | 25 | 34 | 12 | 12 | 34 | 0 | 34 | 34 | 0 | 12 | 34 | 1016 | 2047 | 2036 | 110 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Oiso Jetty surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Oiso Jetty Surf forecast
The above surf forecast table for Oiso Jetty provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Oiso Jetty can be found by selecting the local surf guide option on the grey menu. Our Oiso Jetty 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 (Oiso Jetty) 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 Oiso Jetty 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.
Oiso Jetty is 3 km (2 miles) from Ninomiya. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Ninomiya. Ninomiya has rooms for a wide range of budgets as well as car hire and transport links.
Nearest