Surf Forecasts:
Uchiumi surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 12AM (local time) - 2.5ft (0.7m), 9s period, E swell with glassy winds.
- Most powerful swell: Wednesday 22 Jul, 9AM (local time) - 2.5ft (0.7m), 11s period, E swell with 108 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 12AM (local time) - 2.5ft (0.7m), 9s 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 Monday (Jul 20) at 12AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.3m and 3s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 0.7m 11s and forecast to arrive on Wednesday (Jul 22) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Jul 19) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 20th Jul) | 2.5ft (0.7m) 9s |
| Best Surf | 12AM (Mon 20th Jul) | 2.5ft (0.7m) 9s |
| Most Powerful | 9AM (Wed 22nd Jul) | 2.5ft (0.7m) 11s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
G'day, Rusty here. Lookin' at Uchiumi for the next 16 days, and honest, I've got to be straight with you—there's not a single day that's worth paddling out. The whole stretch from now through early August is a dud. The swell is either tiny, blown out, or both. The first week barely dribbles in with waves around 2ft to 2ft, and while the mornings are sometimes glassy, the energy is weak (69–111 in the combined energy) and the waves are just too small to get any real juice. You'd be bobbing around on ankle-biters. Even those glassy windows on the 20th, 21st, 22nd, 24th, and 25th mornings are only offering "surfable but very ordinary" conditions—hardly worth suiting up.
Then comes a tease on the 27th of July when a proper swell pushes in—6ft to 7ft from the ESE with a 15–16 second period, energy jumping to 1341 and 2538. That's real groundswell, the kind that could fire on a reef like Uchiumi. But the wind is onshore or cross-onshore from the NE and ENE, and by the afternoon it's a mess. The 28th sees even bigger stuff—10ft from the ESE, same long period, but with onshore winds at 12–16 mph and risk of thunderstorms. That's expert-only territory, and even then it'd be a battle. The 29th gets hammered by gale-force winds from the east, making it a total write-off. The 30th offers a bit of relief with cross-offshore WNW winds, but the swell is dropping fast (6ft and then 4ft), and the conditions are still rated poor. After that, it's back to tiny waves and onshore wind.
So what's the takeaway? Uchiumi is a fairly consistent reef that can handle a good SE groundswell, but this forecast window is just a cruel joke. The big swell arrives with the wrong wind, and the small swell is too weak to bother. If you're a beginner, stay away from the 27th–28th when it's over 5ft, and definitely don't go near the 28th when it's over 8ft. For everyone else, there's nothing here. The area is known to have these blank runs, so it's not unusual—just bad timing. Keep an eye on the forecasts, because things can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Sun afternoon, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 30°C on Fri morning, min 27°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 9 | E 9 | E 9 | E 9 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 57 | 56 | 60 | 87 | 89 | 81 | 80 | 78 | 56 | 53 | 108 | 102 | 72 | 69 | 49 | 48 | 47 | 47 | 42 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross | glassy | glassy | cross | glassy | glassy | cross | glassy | glassy | cross-on | cross-off | cross-on | cross | cross-off | glassy | cross | glassy |
High Tide | 8:37AM1.95m | 9:31PM2.01m | 9:27AM1.84m | 10:04PM1.96m | 10:26AM1.70m | 10:41PM1.91m | 11:45AM1.58m | 11:25PM1.86m | 1:35PM1.54m | 00:22AM1.82m | 3:27PM1.63m | 1:33AM1.81m | |||||||
Low Tide | 2:52AM0.87m | 3:01PM0.49m | 3:35AM0.83m | 3:38PM0.68m | 4:26AM0.80m | 4:17PM0.90m | 5:27AM0.77m | 5:06PM1.11m | 6:41AM0.72m | 6:17PM1.29m | 8:00AM0.63m | 8:00PM1.39m | |||||||
 |  | |  |  | | | | | | | | | |  | | | | | |
 | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — |
 | 7:19 | — | 7:19 | — | — | 7:17 | — | — | 7:17 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 2 | — |
Temp °C | 29 | 29 | 30 | 29 | 29 | 30 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 30 | 30 | 28 |
Feels °C | 35 | 34 | 34 | 34 | 34 | 33 | 32 | 32 | 31 | 32 | 33 | 33 | 32 | 33 | 33 | 33 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 |
| kJ | 57 | 56 | 60 | 87 | 89 | 81 | 80 | 78 | 56 | 53 | 108 | 102 | 72 | 69 | 49 | 48 | 47 | 47 | 42 |
Swell 2 Height (m) Direction Period (s) | S 4 | SE 8 | SE 8 | S 3 | SSE 8 | SSE 8 | SSE 8 | SE 8 | E 14 | E 12 | SE 8 | SE 8 | S 7 | S 7 | SE 10 | SE 8 | SE 8 | ESE 18 | SE 11 |
| kJ | 1 | 10 | 10 | 2 | 7 | 7 | 7 | 3 | 14 | 44 | 2 | 2 | 1 | 4 | 4 | 3 | 11 | 31 | 30 |
Swell 3 Height (m) Direction Period (s) | SE 8 | S 7 | SE 8 | S 6 | S 7 | E 5 | S 3 | S 7 | SE 8 | S 3 | S 7 | S 7 | — | SE 20 | ENE 4 | S 7 | ESE 18 | SE 9 | ESE 17 |
| kJ | 10 | 3 | 2 | 1 | 4 | 2 | 1 | 1 | 3 | 2 | 1 | 1 | — | 15 | 1 | 1 | 31 | 3 | 27 |
Wind waves Height (m) Direction Period (s) | SW 4 | — | S 6 | SSW 3 | — | — | SSW 3 | — | — | SSW 4 | — | — | SW 3 | — | — | WSW 6 | — | — | — |
| kJ | 10 | — | 3 | 5 | — | — | 1 | — | — | 5 | — | — | 1 | — | — | 4 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 15 | 0 | 0 | 15 | 0 | 0 | 314 | 0 | 0 | 627 | 2 | 18 | 641 | 2 | 0 | 121 | 0 |
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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