
Surf Forecasts:
Uchizuma surf forecast from 30 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 12PM (local time) - 11ft (3.5m), 18s period, ESE swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 6AM (local time) - 23ft (7.0m), 18s period, SE swell with 32,996 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 1.5ft (0.4m), 11s period with SE 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 Saturday (Aug 01) at 9PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. Another secondary swell of 0.2m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Uchizuma in the next 16 days are 7.0m 18s and forecast to arrive on Thursday (Aug 06) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 02) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 1st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 12PM (Tue 4th Aug) | 11ft (3.5m) 18s |
| Most Powerful | 6AM (Thu 6th Aug) | 23ft (7.0m) 18s |
Table - best surf conditions forecast for Uchizuma over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Uchizuma. It’s a bit of a slow start, but don’t write it off just yet.
First up, the water is sitting at 84°, which is a touch warmer than normal for this time of year – a nice little bonus if you’re paddling out at Uchizuma. The first few days are pretty flat. We’ve got a gap from now until the morning of Sunday, August 2nd where there’s simply nothing worth paddling for. Tiny dribbles of 1ft to 1ft from the SE with short periods and clean winds, but completely gutless. You’ll be floating.
Then Sunday, August 2nd, things finally wake up. The morning sees a 2ft swell from the ESE with a solid 18-second period, and the wind is a cross-off breeze. The combined energy is moderate (323). The afternoon pushes that to 4ft from the ESE, clean with that same cross-off wind, and the energy jumps to 626. For a beginner spot that’s inconsistent, this is a rare and welcome pulse. The long period means the lines will be clean and have some push, though it might break a bit too straight for the beach. Still, for the size, it’s the best on offer.
Monday, August 3rd, keeps the swell building but the wind gets tricky. A 5ft ESE swell at 16 seconds in the morning with cross-shore wind gives light chop, but the energy is strong (1397). The afternoon gets onshore and a bit messy at 7ft. This is still rideable, but the quality drops.
Now, from Tuesday, August 4th through to Friday, August 7th, we get a massive run of swell. The numbers get huge – from 10ft up to 25ft – but this is a beginner break and these waves are far too big for anyone but experts. The combined energy is enormous (5442 up to 54005). The wind is mostly cross or cross-on, but the sheer size will make it a washing machine. This setup is more interesting for kite surfing than paddle surfing. The tides and wind are favorable in the data, but the swell is simply too big for Uchizuma.
After that, the swell drops back. Saturday, August 8th, sees 8ft from the SE with a short, weak 9-second period and cross-on wind. The energy is moderate (1711), but the quality is marginal. This continues through to the middle of the week.
By Tuesday, August 11th, we get a morning window of 5ft from the ESE with glassy conditions. The energy is moderate (395). It’s not the best of the run, but it’s clean and rideable. Wednesday, August 12th, is similar – 4ft in the morning with glass, and a 4ft SE swell in the afternoon with a light cross-off wind. Both are clean, but the power is low.
The last few days, from Thursday, August 13th, onward, fade into poor surf with small, weak swells and onshore winds. Not worth a session.
The standout here is Sunday, August 2nd. That 4ft ESE groundswell with the cross-off wind and moderate energy is the cleanest, most user-friendly wave in the whole window. For a spot that rarely breaks, grab it while you can.
Rusty.
Short Range ForecastMostly dry. Warm (max 35°C on Sun afternoon, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Mon morning. Warm (max 31°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 17 | ESE 18 | ESE 18 | ESE 18 | SE 18 | SE 18 | SE 18 |
Wave Graph | |||||||||||||||||||
23 | 24 | 23 | 23 | 28 | 29 | 64 | 174 | 612 | 612 | 1393 | 2303 | 4013 | 5987 | 7766 | 10689 | 13532 | 19224 | 28080 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | cross-off | glassy | on | off | cross-off | cross-off | off | cross | on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-off |
High Tide | 6:24AM1.77m | 7:36PM1.73m | 7:00AM1.77m | 8:00PM1.74m | 7:37AM1.73m | 8:25PM1.74m | 8:17AM1.67m | 8:51PM1.72m | 9:03AM1.58m | 9:19PM1.69m | 9:59AM1.47m | 9:52PM1.64m | |||||||
Low Tide | 00:44AM0.81m | 1:02PM0.16m | 1:15AM0.74m | 1:31PM0.21m | 1:47AM0.67m | 2:00PM0.31m | 2:22AM0.61m | 2:31PM0.44m | 3:01AM0.57m | 3:03PM0.60m | 3:47AM0.54m | 3:40PM0.78m | |||||||
— | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | |
7:04 | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 3 | 1 | 1 | — | — | — | — |
Temp °C | 28 | 33 | 32 | 28 | 33 | 32 | 29 | 34 | 35 | 30 | 31 | 30 | 27 | 29 | 29 | 26 | 30 | 31 | 27 |
Feels °C | 32 | 36 | 36 | 32 | 35 | 35 | 33 | 36 | 38 | 35 | 35 | 35 | 32 | 33 | 33 | 30 | 33 | 34 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 17 | ESE 18 | ESE 18 | ESE 18 | SE 18 | SE 18 | SE 18 |
23 | 23 | 23 | 23 | 28 | 29 | 41 | 174 | 612 | 612 | 1393 | 2303 | 4013 | 5987 | 7766 | 10689 | 13532 | 19224 | 28080 | |
Swell 2 Height (m) Direction Period (s) | SSW 5 | SSW 5 | S 4 | SE 11 | SSW 4 | ESE 17 | SE 16 | ESE 14 | SSW 8 | SE 10 | SE 10 | SSE 10 | SE 14 | — | — | — | — | — | — |
2 | 4 | 1 | 20 | 2 | 28 | 64 | 120 | 7 | 15 | 15 | 9 | 8 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SE 12 | SE 13 | S 4 | S 7 | S 4 | ESE 19 | SE 9 | SSW 8 | S 8 | S 8 | — | — | — | — | — | — | — | — |
5 | 24 | 6 | 1 | 1 | 1 | 35 | 29 | 7 | 5 | 5 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SW 5 | NE 3 | NE 4 | — | ENE 4 | ESE 6 | E 6 | — | ESE 7 | — | — | — | — |
— | — | — | — | — | — | 3 | 5 | 12 | — | 18 | 55 | 146 | — | 276 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 31 | 2 | 281 | 7 | 368 | 21 | 0 | 0 | 0 | 0 | 21 | 43 | 19 | 19 | 19 | 19 | 21 | 246 | 57 |
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.











