Surf Forecasts:
Uchiumi surf forecast from 30 Aug 2026:
- Best quality surf: Saturday 5 Sep, 6AM (local time) - 6ft (1.9m), 7s period, S swell with glassy winds.
- Most powerful swell: Sunday 6 Sep, 3PM (local time) - 5ft (1.6m), 15s period, SE swell with 1,185 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 9PM (local time) - 2.5ft (0.8m), 7s 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 Sunday (Aug 30) at 9PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.5m and 11s. 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 1.6m 15s and forecast to arrive on Sunday (Sep 06) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Sunday (Sep 06) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 30th Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 6AM (Sat 5th Sep) | 6ft (1.9m) 7s |
| Most Powerful | 3PM (Sun 6th Sep) | 5ft (1.6m) 15s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the table for Uchiumi over the next couple of weeks.
To be straight with you, this forecast is a tough one to read. The first solid bit of surf worth paddling out for doesn't show until Saturday morning, the 5th of September. Before that, we're looking at a long stretch – from the 30th of August right through to the 5th of September – where the conditions are just too poor to recommend. Onshore winds, cross-chop, or just flat spells leave us waiting.
The highlight of the whole period is that Saturday morning, the 6th of September. We've got a clean, glassy start with a light S wind, and a 1.6m swell from the south. The energy is moderate, about 495, and it's the cleanest the lineup will be all period. This is your window for a proper session at Uchiumi reef.
The swell builds through the following week, but the wind is the problem. From the 7th of September onward, we see solid groundswell rolling in – periods climbing to 14 and 15 seconds – with wave heights pushing 3.0m to 4.5m. That's expert-only territory, but the wind is almost always onshore or cross-onshore from the east or northeast, making it ugly. By the 12th and 13th of September, we're looking at near-gale force winds from the east at 50 km/h, which will absolutely shred any chance of a clean wave. At that size and with that wind, Uchiumi is more of a kite-surfing proposition than a paddle-surfing one.
In summary: if you're keen, circle Saturday the 5th of September on your calendar. The rest of the run is either too small and messy, or too big and blown out. The water temp is 29°, which is pretty average for the time of year.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Tue morning. Warm (max 29°C on Sun morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 28mm), heaviest during Wed afternoon. Warm (max 29°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 7 | S 7 | E 11 | E 11 | E 10 | SSE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 9 | SSE 8 | S 8 | SSE 8 | SSE 7 | S 7 | SE 17 | SE 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 74 | 102 | 57 | 57 | 53 | 75 | 164 | 217 | 364 | 419 | 410 | 371 | 447 | 898 | 704 | 619 | 397 | 261 | 226 | 190 | 427 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | glassy | cross | glassy |
High Tide | 7:39PM2.18m | 7:56AM2.15m | 8:04PM2.14m | 8:37AM2.03m | 8:29PM2.09m | 9:23AM1.88m | 8:57PM2.02m | 10:22AM1.71m | 9:28PM1.93m | 11:55AM1.58m | 10:09PM1.81m | 2:33PM1.61m | 11:29PM1.70m | ||||||||
Low Tide | 1:30PM0.47m | 1:47AM0.51m | 1:59PM0.63m | 2:22AM0.49m | 2:29PM0.81m | 3:01AM0.51m | 2:59PM1.00m | 3:46AM0.57m | 3:31PM1.20m | 4:45AM0.65m | 4:16PM1.39m | 6:11AM0.70m | 6:22PM1.53m | ||||||||
 | |  | | |  |  | |  | | | | | | | | | | | | | |
 | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — |
 | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | 3 | 6 | 5 | 8 | 5 | 6 | 9 | 3 | 3 | 2 | — | — | — | — | — | 1 |
Temp °C | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 29 | 29 | 26 | 29 | 29 | 27 |
Feels °C | 32 | 31 | 31 | 30 | 30 | 31 | 30 | 30 | 30 | 29 | 29 | 30 | 31 | 31 | 30 | 30 | 30 | 29 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | S 8 | SSE 8 | SSE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | E 10 | SSE 9 | SSE 8 | SSE 8 | E 9 | ESE 9 | S 7 | ESE 9 | SE 15 |
| kJ | 74 | 67 | 51 | 48 | 51 | 75 | 164 | 217 | 364 | 419 | 410 | 371 | 106 | 629 | 476 | 410 | 106 | 79 | 152 | 106 | 427 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | E 11 | E 10 | E 10 | E 14 | E 14 | E 12 | E 12 | E 11 | E 11 | E 15 | E 10 | E 10 | E 9 | — | E 10 | ESE 9 | SE 17 | ESE 9 |
| kJ | 63 | 61 | 57 | 57 | 53 | 33 | 61 | 129 | 148 | 134 | 119 | 114 | 4 | 96 | 123 | 110 | — | 18 | 106 | 190 | 80 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 6 | SE 10 | E 14 | E 11 | ENE 11 | — | S 14 | E 18 | E 16 | — | ENE 14 | E 16 | E 16 | ESE 9 | E 15 | SE 17 | E 14 | S 9 |
| kJ | 15 | 4 | 4 | 10 | 4 | 16 | 36 | 38 | — | 4 | 6 | 5 | — | 18 | 5 | 5 | 8 | 4 | 11 | 4 | 14 |
Wind waves Height (m) Direction Period (s) | — | S 7 | — | — | — | — | — | — | — | — | — | — | SSE 8 | SSE 9 | SSE 8 | S 8 | SSE 8 | SSE 7 | S 7 | S 6 | S 6 |
| kJ | — | 102 | — | — | — | — | — | — | — | — | — | — | 447 | 898 | 704 | 619 | 397 | 261 | 226 | 113 | 33 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 314 | 0 | 13 | 314 | 43 | 299 | 332 | 286 | 205 | 804 | 286 | 286 | 332 | 5 | 4 | 314 | 0 | 0 | 312 | 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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