Surf Forecasts:
Uchiumi surf forecast from 2 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 3PM (local time) - 16ft (5.0m), 18s period, ESE swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 30ft (9.0m), 17s period, ESE swell with 47,067 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 3PM (local time) - 16ft (5.0m), 18s period with ESE swell.
Best Forecast Surf Conditions for Uchiumi this week:
The surf forecast for Uchiumi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 3PM. The primary swell is predicted to be 5.0m and 18s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 9.0m 17s and forecast to arrive on Thursday (Aug 06) at 3PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 5th Aug) | 16ft (5.0m) 18s |
| Best Surf | 3PM (Wed 5th Aug) | 16ft (5.0m) 18s |
| Most Powerful | 3PM (Thu 6th Aug) | 30ft (9.0m) 17s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
Alright, Rusty here again, this time in feet.
Look, I'm gonna level with you. The next 16 days for this area are a real mixed bag, and honestly, it starts off a bit rough. There’s surf on the way, but for the first few days, the conditions are just not cooperating. We’ve got a big pulse of swell coming in, but it’s going to be blown out and messy.
The first session worth talking about is a real standout, but it comes with a major caveat. The real gem in this forecast is Wednesday afternoon, August 5th, at Uchiumi. This spot is a reef break, and it’s fairly consistent, so it holds up well. We're looking at a serious swell of 16 ft coming from the ESE with a very long period of 18 seconds. The combined energy is massive at 15458, that's strong wave energy. The wind is cross-onshore from the NE at 30 km/h, which isn't perfect, but the report notes the wind and tide are favorable. However, this is big, powerful, long-period groundswell. With that kind of size (over 8 ft), this is strictly for experts only. Beginners, stay well clear. For the experienced crew, this could be a proper session, but the long period might make it a bit too straight on this reef setup. It’s a high-risk, high-reward call.
The situation then gets pretty grim. From Thursday, August 6th, through to Saturday, August 16th, the surf is either too big with howling onshore winds (gusting to 50 km/h), or it's dropping off and just messy. The swell remains substantial, but the wind is a problem. You'll see days with 23 ft swell and 50 km/h winds, which is more of a kite surfing proposition than a paddle session. There are a few days where the swell drops and the wind eases, like around Wednesday, August 13th, but the conditions are still rated as marginal at best, with cross-onshore winds making it choppy. It’s a long stretch of poor to average conditions.
To be honest, there’s really only that one day, Wednesday afternoon, that stands out as a true potential highlight. The rest of the 16-day window is a write-off for any quality, clean waves. The water temperature is sitting around 29°, which is about average for this time of year. So, mark your calendar for August 5th, but only if you’re an expert. Otherwise, you might be better off waiting for the next forecast.
Rusty.
Short Range ForecastHeavy rain (total 37mm), heaviest during Mon night. Warm (max 30°C on Mon morning, min 27°C on Mon night). Winds increasing (light winds from the NNE on Mon night, strong winds from the NE by Wed night). | Days 4-6 Weather SummaryHeavy rain (total 129mm), heaviest during Sat night. Warm (max 29°C on Thu afternoon, min 27°C on Thu morning). Mainly near gales. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | ESE 16 | ESE 16 | ESE 17 | E 17 | ESE 17 | ESE 17 | ESE 17 | ESE 18 | ESE 17 | ESE 18 | ESE 17 | SE 17 | SSE 16 | SE 16 | SSE 16 | SSE 14 | SSE 14 | SSE 14 | ESE 9 | ESE 10 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1038 | 1428 | 2171 | 4066 | 3625 | 6525 | 11066 | 15458 | 21686 | 30132 | 47067 | 38901 | 29335 | 13709 | 10194 | 5421 | 4527 | 2866 | 1859 | 2575 | 1806 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 9:20PM2.04m | 9:43AM1.82m | 9:51PM1.98m | 10:45AM1.67m | 10:27PM1.91m | 12:18PM1.56m | 11:14PM1.84m | 2:34PM1.58m | 00:24AM1.79m | 4:09PM1.71m | 1:55AM1.79m | 4:58PM1.85m | |||||||||
Low Tide | 3:02PM0.65m | 3:38AM0.72m | 3:36PM0.86m | 4:29AM0.72m | 4:14PM1.07m | 5:33AM0.72m | 5:04PM1.28m | 6:56AM0.70m | 6:41PM1.44m | 8:23AM0.61m | 8:51PM1.47m | 9:33AM0.47m | 10:08PM1.38m | ||||||||
 |  |  | | |  |  | | | | | | | | | | | | | | | |
 | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — |
mm | — | 2 | 10 | 3 | 4 | 7 | 4 | 1 | 6 | 4 | 4 | 22 | 11 | 10 | 25 | 13 | 13 | 27 | 12 | 13 | 23 |
Temp °C | 30 | 30 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 33 | 32 | 31 | 31 | 31 | 31 | 28 | 29 | 27 | 25 | 26 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 16 | ESE 17 | E 17 | ESE 17 | ESE 17 | ESE 17 | ESE 18 | ESE 17 | ESE 18 | ESE 17 | SE 17 | SSE 16 | SE 16 | SSE 16 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | S 13 | S 12 |
| kJ | 1038 | 1428 | 2171 | 4066 | 3625 | 6525 | 11066 | 15458 | 21686 | 30132 | 31539 | 38872 | 26594 | 13709 | 10194 | 5421 | 4527 | 2866 | 1739 | 1053 | 1027 |
Swell 2 Height (m) Direction Period (s) | ENE 14 | ENE 15 | ENE 6 | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | E 15 | — | — | — | SE 15 |
| kJ | 21 | 42 | 66 | — | 277 | — | — | — | — | — | — | — | — | — | — | — | 17 | — | — | — | 8 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | S 7 | S 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 9 | 4 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 7 | NE 4 | ENE 6 | E 7 | E 8 | — | — | — | — | — | ESE 17 | ESE 17 | ESE 16 | E 11 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 9 |
| kJ | 5 | 19 | 129 | 320 | 397 | — | — | — | — | — | 47067 | 38901 | 29335 | 6791 | 5428 | 3650 | 2459 | 2157 | 1859 | 2575 | 1806 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 46 | 46 | 43 | 46 | 46 | 46 | 291 | 121 | 291 | 839 | 793 | 831 | 804 | 793 | 793 | 793 | 291 | 793 | 855 | 855 | 236 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Uchiumi Surf forecast
The above surf forecast table for Uchiumi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Uchiumi can be found by selecting the local surf guide option on the grey menu. Our Uchiumi 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 (Uchiumi) 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 Uchiumi 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.
Uchiumi is 19 km (12 miles) from Miyazaki-shi. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Miyazaki-shi. Miyazaki-shi has rooms for a wide range of budgets as well as car hire and transport links.
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