Surf Forecasts:
Uchiumi surf forecast from 15 Aug 2026:
- Best quality surf: Saturday 15 Aug, 9PM (local time) - 3ft (0.9m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 6AM (local time) - 6.5ft (2.0m), 11s period, SSE swell with 926 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 9PM (local time) - 3ft (0.9m), 10s period with E 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 Saturday (Aug 15) at 9PM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 2.0m 11s and forecast to arrive on Friday (Aug 21) at 6AM. 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 (Sat 15th Aug) | 3ft (0.9m) 10s |
| Best Surf | 9PM (Sat 15th Aug) | 3ft (0.9m) 10s |
| Most Powerful | 6AM (Fri 21st Aug) | 6.5ft (2.0m) 11s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
Alright, let me give you the same read in feet and miles per hour.
Looking at the next 16 days for Uchiumi, it’s a rough patch for the most part. The wind is just not cooperating, especially through the first week and a half. There’s a big stretch from the 16th of August to the following weekend where you’re better off doing something else.
The one standout is Thursday the 27th of August, morning. After a long dry spell, this is your window. The swell will be about 7ft from the east, with a solid moderate to strong energy reading (1534), and the wind is light cross-offshore from the SSW at around 6 mph. That’s clean surf. The water temp is a pleasant 83°F, which is normal for the season. The swell has a long 13-second period, so expect good shape. This is a bit too big for beginners (over 5ft), but for the experienced crew, this is the day. Uchiumi is a reef setup that breaks fairly consistently, but expect crowds.
Before that, Sunday the 16th August morning has a tiny little 3ft east swell with glassy wind, but the energy is weak (212). You could get a fun session on a longboard, but it’s very small.
The big waves around the 24th and 25th (up to 10ft) are all blown out by onshore winds and storms, so that’s a no-go for clean surfing – more of a kite situation.
Stick to the 27th. That’s the one.
– Rusty
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 28°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Warm (max 29°C on Thu morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 8 | E 8 | E 6 | E 7 | SE 8 | SSE 9 | SSE 11 | SSE 10 | SSE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 162 | 165 | 162 | 156 | 162 | 192 | 188 | 181 | 136 | 133 | 126 | 123 | 205 | 230 | 115 | 102 | 418 | 430 | 909 | 839 | 628 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | glassy | cross-on | cross | cross-on | cross-on | glassy | on | on | cross-on | on | on | on | on | on | cross-on | on | on | on |
High Tide | 7:48PM2.17m | 7:43AM2.16m | 8:14PM2.14m | 8:24AM2.07m | 8:40PM2.10m | 9:08AM1.93m | 9:08PM2.04m | 10:00AM1.78m | 9:38PM1.97m | 11:12AM1.62m | 10:15PM1.88m | 1:15PM1.55m | 11:10PM1.79m | ||||||||
Low Tide | 1:28PM0.32m | 1:45AM0.68m | 1:59PM0.46m | 2:20AM0.62m | 2:30PM0.63m | 2:58AM0.61m | 3:01PM0.83m | 3:41AM0.63m | 3:33PM1.04m | 4:34AM0.67m | 4:11PM1.24m | 5:47AM0.70m | 5:15PM1.43m | ||||||||
 |  |  | | |  | | |  | | | |  | |  | | | | | | | |
 | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — |
 | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | 2 | — | 3 | 1 | — | 4 | 4 | 6 | 12 |
Temp °C | 27 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 26 |
Feels °C | 29 | 30 | 29 | 30 | 30 | 29 | 31 | 32 | 31 | 30 | 31 | 31 | 30 | 30 | 31 | 32 | 31 | 31 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | S 8 | S 8 | E 6 | SSE 6 | SSE 8 | SSE 9 | SSE 11 | SSE 10 | SSE 10 |
| kJ | 162 | 165 | 162 | 156 | 162 | 192 | 188 | 181 | 136 | 133 | 126 | 123 | 10 | 10 | 115 | 52 | 230 | 430 | 909 | 839 | 628 |
Swell 2 Height (m) Direction Period (s) | S 9 | SSE 8 | S 8 | S 8 | S 8 | S 8 | SSE 8 | SSE 8 | S 8 | S 7 | S 7 | S 8 | SE 10 | SE 10 | ESE 10 | SE 10 | E 7 | E 6 | E 9 | SE 11 | E 9 |
| kJ | 55 | 57 | 49 | 52 | 34 | 31 | 19 | 19 | 18 | 10 | 10 | 10 | 16 | 16 | 20 | 24 | 77 | 52 | 2 | 30 | 38 |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 10 | SE 10 | SE 10 | — | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | W 9 | W 9 | S 8 | — | — | SSE 12 | — | — | ESE 11 |
| kJ | 18 | 2 | 4 | 4 | — | 32 | 31 | 30 | 30 | 18 | 29 | 16 | 1 | 1 | 1 | — | — | 15 | — | — | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | E 8 | E 8 | — | E 7 | SE 8 | — | E 6 | ENE 5 | E 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 205 | 230 | — | 102 | 418 | — | 29 | 23 | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 361 | 4 | 0 | 641 | 4 | 7 | 705 | 0 | 43 | 46 | 43 | 286 | 804 | 43 | 286 | 299 | 46 | 286 | 299 | 46 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||||
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)
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 Uchiumi 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 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.
Nearest