Surf Forecasts:
Uchiumi surf forecast from 21 Aug 2026:
- Best quality surf: Friday 21 Aug, 9PM (local time) - 2.5ft (0.8m), 9s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 9PM (local time) - 16ft (5.0m), 15s period, SE swell with 11,968 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 9PM (local time) - 2.5ft (0.8m), 9s period with SSE 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 Friday (Aug 21) at 9PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 5.0m 15s and forecast to arrive on Tuesday (Aug 25) at 9PM. 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+) | 9PM (Fri 21st Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 9PM (Fri 21st Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 9PM (Tue 25th Aug) | 16ft (5.0m) 15s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
Alright, let’s get into it.
Gonna be honest with you, the next couple of weeks at Uchiumi are looking pretty average. Most of the time we’re fighting onshore wind or just not getting enough quality swell to get excited about. There are a few moments where it could come together, but you’ll need to pick your windows carefully.
First up, Friday the 21st of August – there’s some small swell at 3ft from the SSE, but the wind is on it early and then cross-onshore in the afternoon. It’s not really worth paddling out for. Saturday and Sunday are similar – tiny waves and poor conditions.
We’ve got a big gap here with no real surf on offer until Monday the 24th of August. That morning, a stormy swell kicks in from the ESE, with a period of 13 seconds and combined energy at 1064 (moderate). Swell height is 3ft, but it’s blown out by a moderate breeze. Afternoon gets bigger: 8ft from the ESE with a very long 17-second period, and the energy jumps right up to 3841 (strong). That’s groundswell territory, and with the wind coming straight onshore, it’s going to be messy. Only really for experienced surfers, and even then, it’s a tough call.
Tuesday the 25th is where things go next level – but not in a good way for most. Morning sees a 15ft ESE swell with a 17-second period and combined energy of 12329 (very strong). Afternoon gets even bigger: 18ft from the SE, period 16 seconds, energy 15904. That’s huge. Too big for anyone but experts, and the wind is fresh cross-onshore, turning it lumpy and dangerous. This setup looks more interesting for kite surfing than paddle surfing.
Wednesday the 26th stays big but gets blown out completely by near gale force winds. Not a day to be in the water.
Thursday the 27th still has 13ft swell in the morning from the SE, but it’s cross-shore with moderate breeze, making it choppy. Energy is still high at 5076. Only for the brave. The afternoon drops to 12ft but the wind turns a bit more cross-onshore.
Friday the 28th is dropping – 8ft in the morning from the SE, period 9 seconds. Light cross-shore wind, but the energy is down to 970 (moderate). Still a bit lumpy.
The rest of the period into early September is mostly poor: onshore winds, small to moderate swell, and pretty choppy or blown out conditions. There is a notable window on the 3rd of September, Thursday afternoon – an 8ft swell from the E, with a very long 20-second period, and combined energy of 6148 (strong). Wind is light and onshore, but the period suggests proper groundswell. That could be one for the reef, but the wind direction isn’t ideal.
Friday the 4th of September morning holds 10ft from the E, 15-second period, energy 4643, but again wind is onshore.
Honestly, if I had to pick a standout, it’s probably the Monday 24th of August afternoon – 8ft from the ESE, long period, strong energy – but it’s onshore. For cleaner conditions, keep an eye on the 3rd of September afternoon – that long period E swell could produce some proper lines at Uchiumi’s reef setup, if the wind lays off a touch.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 62mm), heaviest during Wed morning. Warm (max 28°C on Mon morning, min 26°C on Mon night). Winds decreasing (near gales from the ENE on Tue night, light winds from the SSE by Wed night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | SSE 9 | SSE 9 | SSE 9 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 12 | ESE 19 | ESE 17 | ESE 16 | ESE 16 | SE 16 | SE 14 | SSE 12 | SSE 11 | SE 11 | SE 10 | SSE 9 | SE 8 |
Wave Graph | |||||||||||||||||||||
140 | 129 | 106 | 70 | 72 | 73 | 71 | 78 | 138 | 650 | 3354 | 5772 | 9276 | 10999 | 9697 | 5409 | 3197 | 3807 | 1742 | 1109 | 623 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | on | on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross | cross |
High Tide | 1:15PM1.55m | 11:10PM1.79m | 3:33PM1.65m | 00:50AM1.73m | 4:30PM1.80m | 2:33AM1.77m | 5:05PM1.93m | 3:44AM1.89m | 5:34PM2.03m | 4:36AM2.02m | 6:00PM2.11m | 5:21AM2.13m | 6:25PM2.16m | ||||||||
Low Tide | 5:15PM1.43m | 7:22AM0.69m | 7:52PM1.52m | 8:50AM0.59m | 9:39PM1.43m | 9:52AM0.46m | 10:31PM1.29m | 10:39AM0.34m | 11:08PM1.13m | 11:19AM0.27m | 11:41PM0.97m | 11:55AM0.25m | 00:12AM0.81m | ||||||||
5:41 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | |
— | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | — | 1 | 2 | — | — | 2 | — | — | 3 | 4 | 19 | 16 | 9 | 9 | 8 | 8 | 29 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 28 |
Feels °C | 33 | 31 | 32 | 31 | 31 | 32 | 31 | 31 | 31 | 30 | 30 | 30 | 26 | 26 | 25 | 25 | 25 | 27 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | SSE 9 | SSE 9 | S 8 | SSE 8 | E 10 | E 10 | ESE 6 | ESE 10 | ESE 19 | ESE 17 | ESE 16 | ESE 16 | SE 16 | SE 14 | SE 12 | SE 11 | SE 11 | SE 10 | SE 9 | SE 8 |
140 | 129 | 106 | 69 | 72 | 73 | 71 | 27 | 131 | 650 | 3354 | 5772 | 9276 | 10999 | 9697 | 4749 | 2696 | 3397 | 1742 | 918 | 623 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | E 9 | E 9 | E 10 | E 10 | S 8 | S 8 | E 10 | ESE 12 | ESE 13 | ESE 6 | ESE 7 | E 16 | E 15 | E 14 | E 21 | E 13 | E 18 | E 17 | E 16 | E 15 |
28 | 63 | 42 | 70 | 70 | 50 | 34 | 78 | 138 | 257 | 72 | 131 | 43 | 69 | 102 | 9 | 56 | 6 | 24 | 46 | 67 | |
Swell 3 Height (m) Direction Period (s) | E 7 | E 14 | E 14 | E 14 | SE 9 | E 14 | E 13 | S 8 | S 8 | E 10 | E 10 | E 9 | — | — | — | — | E 19 | E 18 | ENE 17 | SW 10 | E 12 |
14 | 4 | 4 | 4 | 3 | 15 | 29 | 22 | 21 | 47 | 96 | 44 | — | — | — | — | 7 | 25 | 28 | 16 | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | — | E 6 | — | E 4 | ESE 5 | — | — | ESE 5 | ESE 6 | ENE 9 | ENE 9 | — | — | SSE 12 | SSE 11 | SSE 11 | — | SSE 9 | — |
— | — | — | 11 | — | 8 | 15 | — | — | 20 | 130 | 49 | 16 | — | — | 5409 | 3197 | 3807 | — | 1109 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 46 | 46 | 0 | 46 | 314 | 43 | 46 | 314 | 43 | 79 | 46 | 46 | 79 | 361 | 205 | 669 | 669 | 640 | 205 | 498 | 205 |
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.











