Surf Forecasts:
Uchiumi surf forecast from 30 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 9AM (local time) - 16ft (5.0m), 18s period, ESE swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 3AM (local time) - 34ft (10.5m), 19s period, ESE swell with 76,352 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 1.5ft (0.4m), 11s 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 Saturday (Aug 01) at 9PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.2m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 10.5m 19s and forecast to arrive on Thursday (Aug 06) at 3AM. 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 1st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 9AM (Wed 5th Aug) | 16ft (5.0m) 18s |
| Most Powerful | 3AM (Thu 6th Aug) | 34ft (10.5m) 19s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
Alright, Rusty here to talk about Uchiumi.
We’ve got a few days of flatness to start. The first real swell shows up on Sunday the 2nd of August. That morning, you’re getting a 2ft wave from the ESE, with a long 16-second period. The wind is glass, so it’s gonna be silky smooth. The combined swell energy is moderate at 255. The water temperature is 85°, a touch warmer than usual. It’s not a big swell, but on this reef, that long-period groundswell will give you some clean, lined-up rides.
The swell builds Sunday afternoon and into Monday, but the wind turns onshore. By Monday morning the 3rd of August, the swell is 5ft from the ESE, 16-second period, with combined energy of 1060. That’s a solid push of energy, but the cross-onshore wind will make it lumpy and choppy.
From Tuesday the 4th of August through Friday the 7th of August, it gets too big for most. Waves over 8ft, with the 5th of August seeing a 16ft swell from the ESE and an 18-second period, combined energy at 15115. Wind is strong cross-onshore. This is expert-only, or you’re better off kiting. It’s a messy beast.
The second week calms down. Wednesday morning the 12th of August is a top pick: a 7ft swell from the ESE, 12-second period, combined energy of 1494. The wind is dead calm, glassy. This is excellent for experienced surfers. The swell direction is right for the break, and the waves will hold up well on the reef. Long period means longer waits between sets, but cleaner paddling.
Thursday the 13th of August is also good. Morning glass with a 6ft E swell, 12-second period, combined energy of 1240. Again, excellent conditions for the experienced crew.
After that, the surf drops off noticeably through the 14th and 15th of August. Small and weak finish to the run.
So, circle Sunday the 2nd for smaller, clean waves, or Wednesday the 12th and Thursday the 13th for bigger, glassy conditions. Those are your windows.
- Rusty
Short Range ForecastMostly dry. Warm (max 31°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 40mm), heaviest during Tue afternoon. Warm (max 30°C on Mon morning, min 27°C on Mon night). Winds increasing (light winds from the NE on Mon night, strong winds from the ENE by Wed night). | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 9 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 15 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 19 | ESE 19 | ESE 17 | SE 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 28 | 28 | 28 | 40 | 47 | 211 | 284 | 778 | 1025 | 1273 | 2864 | 4199 | 5591 | 8748 | 15115 | 21781 | 45072 | 64104 | 48355 | 28076 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-off | cross | cross-off | glassy | cross | glassy | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | cross-on |
High Tide | 7:56PM2.14m | 7:28AM2.14m | 8:23PM2.12m | 8:09AM2.07m | 8:51PM2.09m | 8:53AM1.96m | 9:20PM2.04m | 9:43AM1.82m | 9:51PM1.98m | 10:45AM1.67m | 10:27PM1.91m | 12:18PM1.56m | 11:14PM1.84m | ||||||||
Low Tide | 1:23PM0.19m | 1:42AM0.84m | 1:56PM0.30m | 2:17AM0.78m | 2:29PM0.46m | 2:55AM0.73m | 3:02PM0.65m | 3:38AM0.72m | 3:36PM0.86m | 4:29AM0.72m | 4:14PM1.07m | 5:33AM0.72m | 5:04PM1.28m | ||||||||
 | |  | | | |  | | | | |  |  | | | | | | | | | |
 | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — |
 | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 11 | 6 | 8 | 4 | 2 | 2 | 7 | 6 | 9 | 14 |
Temp °C | 31 | 30 | 28 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 33 | 33 | 32 | 33 | 33 | 35 | 35 | 34 | 34 | 33 | 33 | 31 | 30 | 31 | 30 | 27 | 28 | 26 | 25 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 15 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 18 | ESE 19 | — | — | SSE 16 |
| kJ | 28 | 28 | 28 | 28 | 40 | 47 | 211 | 284 | 778 | 1025 | 1273 | 2864 | 4199 | 5591 | 8748 | 15115 | 21781 | 45072 | — | — | 21817 |
Swell 2 Height (m) Direction Period (s) | S 7 | S 7 | SW 4 | E 12 | SE 16 | E 15 | SE 9 | E 18 | S 8 | ENE 14 | S 7 | ENE 6 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | 1 | 3 | 10 | 17 | 20 | 158 | 4 | 21 | 4 | 33 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | NE 4 | E 12 | S 7 | E 19 | E 18 | ESE 18 | ESE 11 | S 8 | SE 10 | SSE 10 | S 7 | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 3 | 1 | 7 | 7 | 30 | 24 | 1 | 15 | 9 | 4 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NE 3 | ENE 4 | E 6 | — | — | E 8 | — | — | — | ESE 19 | ESE 17 | SE 16 |
| kJ | — | — | — | — | — | — | — | — | — | 5 | 11 | 69 | — | — | 566 | — | — | — | 64104 | 48355 | 28076 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 363 | 299 | 701 | 763 | 0 | 0 | 314 | 0 | 46 | 299 | 43 | 46 | 46 | 46 | 291 | 804 | 205 | 793 | 804 | 804 |
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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