
Surf Forecasts:
Uchizuma surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 9AM (local time) - 4ft (1.2m), 12s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 9AM (local time) - 4ft (1.2m), 12s period, SSW swell with 384 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 9AM (local time) - 4ft (1.2m), 12s period with SSW swell.
Best Forecast Surf Conditions for Uchizuma this week:
The surf forecast for Uchizuma over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 09) at 9AM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 1.0m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Uchizuma in the next 16 days are 1.2m 12s and forecast to arrive on Sunday (Aug 09) 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 0.8m 4s period and expected on Tuesday (Aug 11) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 9th Aug) | 4ft (1.2m) 12s |
| Best Surf | 9AM (Sun 9th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 9AM (Sun 9th Aug) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Uchizuma over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's coming up for Uchizuma.
The outlook kicks off this Sunday morning, August 9th, and we've got a solid window of fun waves to start. The early call is for head-high swell around 4ft coming from the SSW with a 12-second period, which gives it some nice push. The combined energy is a solid moderate 852. What really makes it special is the glassy conditions, with a slight offshore touch from the SE. The water is sitting at 84°, which is a touch warmer than normal for this time of year. It's a beginner-friendly break, but it's inconsistent, so you'll be waiting a bit for the sets. That early Sunday morning session is your standout of the whole forecast period. Afternoon on Sunday looks marginal with onshore wind, so make the most of the morning.
Monday the 10th sees the swell drop a touch to 3.5ft, still from the south, but we get another glassy morning with a NE breeze. The energy is still moderate at 513. The waves will be there, but it's not as good as Sunday morning. Tuesday the 11th drops further to 3ft, but clean with a cross-offshore wind. From Wednesday the 12th onward, the swell really starts to fade, dropping below 3ft and the energy falls off a cliff. The wind stays light, but the surf is ordinary at best. From Wednesday through to the end of the third week of August, you're looking at a long stretch of tiny, weak waves. There are days with glassy mornings but the swell is just too small to get excited about – we're talking ankle to knee-high stuff with combined energy barely cracking 100 or just above.
Then, there's a flicker of hope on Saturday, August 22nd. The morning brings back a clean 4ft SSW swell with a decent 11-second period. The combined energy jumps back up to a moderate 439. The wind is glassy from the east. This is the second standout session, but it's a long-range call so don't book your flights yet. The rest of that weekend and into the following Monday looks messy with onshore and cross-onshore winds making things choppy and average.
Overall, the best of the best is that first glassy Sunday morning, August 9th. It's the cleanest, most energetic swell of the whole run. The Saturday the 22nd morning is a promising second option, but it's further out and less certain. For the long stretch in between, you're better off cleaning your wetsuit and waiting.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 30°C on Sun morning, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 29mm), heaviest during Thu afternoon. Warm (max 28°C on Fri morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | SSW 12 | SSW 12 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 11 | SSW 10 | SSW 11 | S 10 | S 9 | SSW 9 | S 9 | S 9 | S 9 | S 9 | SE 10 | SE 10 | S 10 |
Wave Graph | |||||||||||||||||||||
384 | 378 | 289 | 242 | 190 | 260 | 212 | 212 | 133 | 180 | 161 | 70 | 57 | 88 | 81 | 60 | 57 | 57 | 89 | 96 | 90 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | glassy | off | cross-off | cross-off | off | cross-off | glassy | cross | cross | cross-on | glassy | glassy | on | glassy | glassy | cross-on | glassy |
High Tide | 4:29PM1.55m | 2:42AM1.58m | 5:14PM1.67m | 3:52AM1.69m | 5:51PM1.75m | 4:49AM1.80m | 6:24PM1.81m | 5:39AM1.88m | 6:54PM1.83m | 6:24AM1.90m | 7:22PM1.83m | 7:07AM1.87m | 7:49PM1.81m | ||||||||
Low Tide | 9:34PM1.16m | 10:02AM0.17m | 10:33PM1.05m | 10:55AM0.05m | 11:18PM0.92m | 11:39AM-0.00m | 11:58PM0.78m | 12:20PM0.01m | 00:35AM0.66m | 12:56PM0.09m | 1:12AM0.56m | 1:30PM0.22m | 1:48AM0.49m | ||||||||
5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | |
— | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — | |
mm | — | 1 | — | 1 | 2 | — | — | — | — | — | — | 5 | 6 | 8 | 7 | — | 2 | 1 | — | 1 | 2 |
Temp °C | 30 | 29 | 26 | 29 | 29 | 26 | 30 | 30 | 24 | 27 | 27 | 25 | 25 | 25 | 24 | 28 | 27 | 25 | 29 | 29 | 25 |
Feels °C | 33 | 32 | 30 | 33 | 33 | 29 | 29 | 29 | 24 | 28 | 31 | 29 | 28 | 27 | 27 | 31 | 30 | 29 | 32 | 32 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 10 | SSW 11 | S 10 | S 9 | SSW 9 | S 9 | S 9 | S 9 | S 9 | SE 10 | SE 10 | S 10 |
384 | 378 | 289 | 242 | 190 | 260 | 212 | 212 | 90 | 180 | 161 | 70 | 57 | 88 | 81 | 60 | 57 | 57 | 89 | 96 | 90 | |
Swell 2 Height (m) Direction Period (s) | ESE 13 | E 13 | ESE 13 | E 12 | E 12 | E 12 | E 11 | E 11 | SSW 11 | E 10 | S 10 | SSW 10 | SSW 10 | SE 12 | ESE 5 | E 9 | E 9 | E 4 | S 8 | S 10 | ESE 10 |
372 | 339 | 286 | 193 | 144 | 99 | 38 | 37 | 133 | 18 | 18 | 68 | 38 | 22 | 17 | 39 | 14 | 10 | 51 | 70 | 85 | |
Swell 3 Height (m) Direction Period (s) | SSE 7 | S 11 | SSW 11 | SSW 11 | SSW 11 | SE 14 | SE 13 | SE 13 | E 10 | SE 13 | E 10 | ESE 4 | SE 12 | E 9 | E 9 | SE 11 | SE 11 | SSE 11 | E 10 | E 10 | ESE 12 |
96 | 181 | 219 | 78 | 76 | 31 | 28 | 27 | 33 | 27 | 8 | 7 | 23 | 7 | 6 | 20 | 19 | 47 | 31 | 33 | 46 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNE 3 | NE 3 | NE 5 | NE 4 | NE 5 | NNE 4 | NE 3 | E 4 | E 4 | ESE 5 | — | — | ESE 5 | — | — | — | — |
— | — | — | — | 2 | 3 | 10 | 23 | 13 | 1 | 2 | 17 | 8 | 17 | — | — | 9 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 43 | 19 | 385 | 0 | 0 | 2 | 0 | 0 | 19 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Uchizuma Surf forecast
The above surf forecast table for Uchizuma provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Uchizuma can be found by selecting the local surf guide option on the grey menu. Our Uchizuma 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 (Uchizuma) 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 Uchizuma 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.
Are you planning a holiday in Shikoku? If you are looking for accommodation near Uchizuma, camping, hotels and holiday cottages in Shikoku, consider staying in Anan which is 40 km (25 miles) away. Other places in and around Shikoku where you can find information about places to rent, and car hire include Muroto which is 45 km (28 miles) away, Komatsushima, Aki and Kamojima.











