Uchizuma Surf Break

Lat Long: 33.64° N 134.38° E

Uchizuma Surf Forecast and Surf Report

Issued: 2 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Uchizuma sea temperature is
28.2° C
0.5° 

Uchizuma surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Uchizuma surf forecast from 20 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 12AM (local time) - 11ft (3.5m), 16s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 15ft (4.5m), 16s period, SSE swell with 10,010 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 9AM (local time) - 3ft (0.9m), 9s period with S 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 Friday (Aug 21) at 9AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Uchizuma in the next 16 days are 4.5m 16s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Fri 21st Aug)3ft (0.9m) 9s
Best Surf12AM (Tue 25th Aug)11ft (3.5m) 16s
Most Powerful 3PM (Tue 25th Aug)15ft (4.5m) 16s

Table - best surf conditions forecast for Uchizuma over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at what's cookin' for Uchizuma.

Alright, first things first, Uchizuma is a beginner-friendly wave that's inconsistent, so it needs a bit of luck to turn on. The water temp is sittin' at 83° which is about average for this time of year, nice and warm.

The next week or so is pretty average, with small, weak swells. Friday the 21st and Saturday the 22nd have some glassy mornings with surf around 3ft to 3ft, but the energy is weak (175 and 155), so it's more of a paddle-around session than anything with real punch. Saturday afternoon and Sunday are a write-off with onshore winds.

Now, Monday the 24th morning is where things get interesting. We've got a 5ft swell from the SE with a *very* long period of 19 seconds. The energy jumps to 2114, which is moderate and felt. The wind is glassy. This is a standout. That long-period groundswell is going to wrap in nicely, especially for a point or reef. For a beach break, that period might make it a bit too straight, but Uchizuma is fairly exposed, so it could still offer some clean, lined-up waves. It's a solid beginner option, but that energy and length mean it'll have more push.

Tuesday the 25th though... the swell pumps up to 13ft in the morning and 15ft in the afternoon. That is expert-only territory. The combined energy is massive (8733 and 10042). It's just too big for this break, so unless you're on a gun and charging, give it a miss.

Wednesday and Thursday (26th & 27th) stay big, with 12ft to 8ft swells, but the wind goes onshore or cross-onshore, making it a choppy mess. Not worth it for paddling, but with that much wind and swell, it's looking more interesting for kite surfing.

By Friday the 28th morning, the swell drops back to 8ft, the wind goes glassy again, and the energy is 820. This is another winner. It's a touch big for beginners, but for the experienced crew, it'll have some good, clean waves. The risk of thunderstorms is there, but if you get out in the morning, it'll be worth it.

Saturday the 29th morning is small again at 4ft, but with a flat calm wind (0 km/h) and glassy conditions, it'll be a fun little longboard session.

The start of September looks pretty quiet, with small, onshore conditions, until Thursday the 3rd of September. That morning, a new swell arrives: 8ft from the ESE with a massive 20-second period and energy of 5979. The wind is light cross-on. It's a promising but less certain long-range call. That's a big, powerful groundswell. For a reef or point, it'd be dreamy, but for Uchizuma, it might be too much for the break and could be straight. The afternoon gets even bigger at 12ft, so only for the big-wave crew.

So, overall, the best bets are Monday the 24th morning and Friday the 28th morning. The first one has that long-period, glassy magic, and the second is a solid, clean swell. Tuesday the 25th and Thursday the 3rd are for experts only.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri afternoon. Warm (max 30°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 81mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 25°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SE by Wed night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
0
0
0
0
4
2
!
!
!
!
!
!
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
S
9
0.9
S
10
0.8
SSW
9
0.8
SSW
9
0.7
SSW
9
0.6
SSW
8
0.4
ESE
11
0.4
SW
9
0.6
ESE
12
1.6
SE
19
2.5
SE
16
3.5
SSE
16
4
SSE
16
4.5
SSE
16
4
SSE
14
3.5
SSE
12
3.5
SSE
11
4
SSE
11
3.5
S
11
2.5
SSE
10
2.5
SSE
9
Wave Graph
Metric surfscale
Energy kJ
127
145
108
108
80
55
38
24
102
1844
3631
6144
8699
10010
7164
3030
2686
4169
2626
1394
1012
Wind (km/h)
5
SSE
10
SSW
5
WSW
5
SE
15
S
5
WSW
5
S
10
S
10
SW
5
SE
15
SSE
0
NNW
5
ESE
10
ESE
5
E
20
ESE
20
SE
35
SE
25
SE
25
S
15
SW
Wind State
glassy
cross-on
cross
glassy
cross-on
cross
on
on
cross-on
glassy
on
glassy
glassy
cross-on
cross
cross-on
cross-on
on
on
cross-on
cross-on
High Tide
2:05PM1.21m
10:36PM1.39m
4:20PM1.32m
00:36AM1.34m
4:43PM1.42m
2:31AM1.38m
5:04PM1.52m
3:35AM1.49m
5:25PM1.60m
4:20AM1.60m
5:47PM1.67m
4:59AM1.70m
6:08PM1.73m
Low Tide
4:07PM1.20m
7:28AM0.66m
8:19PM1.26m
8:57AM0.58m
9:51PM1.18m
9:51AM0.47m
10:27PM1.07m
10:31AM0.36m
10:55PM0.96m
11:05AM0.27m
11:22PM0.84m
11:35AM0.21m
11:50PM0.72m
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:28
5:28
5:30
5:30
5:31
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:43
6:40
6:39
6:38
6:37
6:37
6:35
 mm
2
1
1
14
11
11
44
28
23
13
Temp °C
29
28
26
30
29
26
30
30
26
29
29
26
29
29
26
27
27
26
26
26
26
Feels °C
32
32
31
33
32
30
32
34
31
33
32
32
32
33
30
30
30
27
28
28
30
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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