Surf Forecasts:
Kojima surf forecast from 29 Aug 2026:
- Best quality surf: Saturday 5 Sep, 6AM (local time) - 5ft (1.5m), 8s period, E swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 12AM (local time) - 7.5ft (2.3m), 11s period, SSE swell with 1,172 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 3AM (local time) - 2ft (0.6m), 12s period with E swell.
Best Forecast Surf Conditions for Kojima this week:
The surf forecast for Kojima over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 3AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.6m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kojima in the next 16 days are 2.3m 11s and forecast to arrive on Friday (Sep 04) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 30) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 30th Aug) | 2ft (0.6m) 12s |
| Best Surf | 6AM (Sat 5th Sep) | 5ft (1.5m) 8s |
| Most Powerful | 12AM (Fri 4th Sep) | 7.5ft (2.3m) 11s |
Table - best surf conditions forecast for Kojima over the next 16 days.
The Lowdown
Alright, Rusty here, looking at the local forecast. Bit of a tough stretch ahead for our shores, but let's get into it.
The next week and a half is mostly a write-off, with a couple of very specific windows that might be worth a look if you're really keen. There's a big gap of poor conditions from now until the 5th of September, so don't even bother waxing up until then.
Your best bet, and honestly the only real standout, is the early session on Saturday, the 5th of September. The swell is coming from the east at 6ft, and the wind is forecast to be glassy, absolutely dead calm. That's a huge positive. The water temp is sitting at 84°F, which is about normal for this time of year. The energy is moderate, with a combined reading of 463. The only catch is the swell period is short at 7 seconds, so it'll be a bit choppy and lacking that real punch. It's a beginner-friendly break and fairly consistent, but crowds are likely here. Still, with glassy conditions you'll get the cleanest surf we've seen in a while.
Saturday afternoon, the wind swings onshore and the swell picks up a bit to 7ft, but it gets messy. The Sunday morning after that, the 6th, sees a big jump in swell to 12ft with a period of 10 seconds, but it's all cross-onshore wind and rough. That's for experts only, and even then, it's a kite-surfing kind of day. The energy is very strong at 2368, but the quality is poor.
The week after that, from the 9th of September onward, you get a longer period groundswell from the east around 13 seconds, but it's usually accompanied by strong onshore winds or side-shore chop. The swell hangs around 7ft to 8ft, but the conditions are always marginal. You'll see some decent waves, but they'll be blown out and lumpy. By the 13th, the swell drops right off.
So, to sum it up: if you're free early on Saturday the 5th, get out there for the glassy dawn patrol. Otherwise, it's a long wait for disappointing surf.
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Mon night. Warm (max 29°C on Sat afternoon, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 53mm), heaviest during Wed night. Warm (max 28°C on Tue afternoon, min 26°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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) | SSE 7 | E 12 | E 12 | S 7 | E 11 | E 11 | E 11 | SE 7 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SE 7 | SE 8 | SSE 8 | SSE 11 | SSE 9 | SSE 9 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 140 | 109 | 98 | 81 | 62 | 63 | 63 | 126 | 267 | 334 | 433 | 307 | 314 | 209 | 305 | 242 | 1172 | 495 | 378 | 277 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross | on | on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on |
High Tide | 7:18PM2.10m | 7:22AM2.19m | 7:43PM2.09m | 8:01AM2.12m | 8:08PM2.07m | 8:42AM2.02m | 8:35PM2.04m | 9:27AM1.87m | 9:02PM1.98m | 10:23AM1.72m | 9:35PM1.90m | 11:45AM1.58m | 10:16PM1.80m | |||||||
Low Tide | 1:16AM0.60m | 1:36PM0.49m | 1:49AM0.52m | 2:06PM0.63m | 2:25AM0.49m | 2:36PM0.80m | 3:04AM0.51m | 3:07PM0.98m | 3:48AM0.56m | 3:40PM1.16m | 4:45AM0.63m | 4:23PM1.33m | ||||||||
 |  |  | |  | | |  |  | |  | | | | | | | | | | |
 | — | — | 5:48 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — |
 | 6:43 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | — | — | — | — | — | — | — | 4 | 3 | 3 | 7 | 3 | 5 | 18 | 7 | 4 | 5 | 1 | — | — |
Temp °C | 29 | 27 | 29 | 29 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 32 | 31 | 29 | 30 | 30 | 30 | 29 | 30 | 30 | 29 | 30 | 29 | 28 | 29 | 30 | 31 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | E 12 | S 7 | SSE 7 | S 7 | SSE 7 | S 8 | SSE 7 | S 9 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SE 7 | E 10 | SSE 8 | SSE 11 | SSE 9 | SSE 9 | E 8 |
| kJ | 104 | 109 | 86 | 81 | 35 | 36 | 26 | 40 | 267 | 334 | 433 | 307 | 314 | 209 | 100 | 242 | 1172 | 495 | 378 | 277 |
Swell 2 Height (m) Direction Period (s) | SW 9 | E 12 | E 12 | E 11 | S 8 | SSE 7 | E 11 | ENE 11 | E 14 | E 14 | E 12 | E 12 | E 11 | E 11 | E 15 | E 10 | E 12 | ENE 11 | E 10 | SSE 8 |
| kJ | 3 | 101 | 98 | 65 | 36 | 27 | 63 | 38 | 61 | 91 | 148 | 175 | 157 | 146 | 17 | 94 | 27 | 41 | 54 | 188 |
Swell 3 Height (m) Direction Period (s) | SE 13 | SSE 9 | SE 9 | SE 10 | E 11 | E 11 | SSW 8 | SE 9 | ENE 11 | ENE 11 | W 10 | SE 10 | SE 10 | S 9 | E 15 | SSE 12 | SW 10 | E 16 | E 16 | ENE 10 |
| kJ | 7 | 8 | 14 | 15 | 62 | 63 | 22 | 13 | 38 | 37 | 2 | 15 | 15 | 61 | 17 | 15 | 4 | 5 | 5 | 34 |
Wind waves Height (m) Direction Period (s) | SSE 7 | SW 3 | — | — | — | — | — | SE 7 | — | — | — | — | — | — | SE 8 | NE 4 | ENE 9 | E 9 | E 8 | — |
| kJ | 140 | 5 | — | — | — | — | — | 126 | — | — | — | — | — | — | 305 | 24 | 295 | 299 | 273 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 344 | 35 | 0 | 344 | 23 | 80 | 14 | 14 | 319 | 829 | 80 | 319 | 829 | 319 | 319 | 319 | 90 | 262 | 262 | 23 |
Best forecast wave conditions in Kyu Shu | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Kojima Surf forecast
The above surf forecast table for Kojima provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kojima can be found by selecting the local surf guide option on the grey menu. Our Kojima 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 (Kojima) 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 Kojima 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.
Kojima is 13 km (8 miles) from Kushima. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Kushima. Kushima has rooms for a wide range of budgets as well as car hire and transport links.
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