Uchiboso Surf Break

Lat Long: 35.03° N 139.82° E

Uchiboso Surf Forecast and Surf Report

Issued: 2 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Uchiboso sea temperature is
27.7° C
1.1° 

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


Uchiboso surf forecast from 3 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 9PM (local time) - 8ft (2.5m), 17s period, SW swell with offshore winds.
  • Most powerful swell: Wednesday 5 Aug, 12AM (local time) - 10ft (3.0m), 16s period, SE swell with 4,529 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 12PM (local time) - 8ft (2.5m), 16s period with SE swell.

Best Forecast Surf Conditions for Uchiboso this week:

The surf forecast for Uchiboso over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 12PM. The primary swell is predicted to be 2.5m and 16s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Uchiboso in the next 16 days are 3.0m 16s and forecast to arrive on Wednesday (Aug 05) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 13s period and expected on Monday (Aug 10) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Tue 4th Aug)8ft (2.5m) 16s
Best Surf 9PM (Sun 9th Aug)8ft (2.5m) 17s
Most Powerful12AM (Wed 5th Aug)10ft (3.0m) 16s

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


The Lowdown

G’day, Rusty here. Righto, let’s have a look at what’s comin’ down the line for the Uchiboso region. It’s a bit of a slow burn for the first few days, but once it fires, it’s gonna be a proper session for those who are keen.

The first real surf we’ve got on offer hits Tuesday morning, August 4th. The water’s sittin’ at 82°, which is a touch warmer than normal for this time of year. We’ve got a solid 8ft swell from the SE, with a 16-second period – that’s proper groundswell energy, and there’s a heap of it, with combined energy reading 3026. The wind’s a fresh offshore from the NNE, so it’s gonna be clean. The catch is, this break is sheltered and rarely breaks, so you’re not gonna get a wave every time. It’s an intermediate spot, but with that size and those long-period lines, it’ll be better for experienced surfers. The afternoon cleans up a bit more with a moderate offshore from the ENE and an 8ft SE swell.

Wednesday, August 5th, the swell jumps up to 10ft from the SSE, with a 15-second period. The energy is massive – 4009 in the morning – and the wind stays offshore, keeping it clean. This is only for the experienced crew; 10ft is big, and the period means it’ll have some serious push. The morning does have a bit of cloud, but it’s clear by the afternoon with a gentler offshore breeze. Thursday, August 6th, is the real standout. The swell holds at 10ft from the SSE, the period drops to 14 seconds, but the wind goes to a gentle offshore from the NE in the morning. It’s just about as clean as it gets. The combined energy reading of 2814 is still very strong. This is the best of the bunch – big, clean, powerful waves for the experienced surfer.

Friday, August 7th, through to Sunday, August 9th, the swell drops to 8ft, but it swings around to the SSW. The wind is cross-offshore, so the waves are still clean, but there are some rain showers and even a risk of thunderstorms on Saturday. The energy stays high, up to 5692 on Sunday afternoon, but the quality’s a bit more marginal. Monday, August 10th, keeps the 8ft SSW swell, but the wind goes back to a fresh offshore, so it’s clean again. Then, from Tuesday, August 11th, the swell drops off. Tuesday morning has 6ft, but the afternoon pops up to 8ft from the east with a 12-second period and a light offshore breeze – that’s a clean, fun session for the intermediates.

After that, it’s a long, dry spell. From Wednesday, August 12th, all the way through to Wednesday, August 19th, the surf is pretty much not worth paddling for. The swell drops to 4ft and below, the wind goes onshore or cross-onshore, and the conditions are just poor. There’s a brief, glassy moment on Saturday, August 15th, with a tiny 3ft swell from the ESE, but it’s not enough to get excited about. So, the best window is from Tuesday, August 4th, through to Tuesday, August 11th, with Thursday, August 6th, being the absolute pick of the bunch.

Stay safe out there.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Thu morning, min 22°C on Tue night). Winds decreasing (fresh winds from the NNE on Tue morning, light winds from the NE by Thu morning).

Days 4-6 Weather Summary

Moderate rain (total 13mm), heaviest on Fri night. Warm (max 28°C on Fri morning, min 23°C on Sun night). Wind will be generally light.

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
3
3
4
4
4
4
3
3
3
3
3
3
4
4
3
4
3
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SE
16
2.5
SE
16
3
SE
16
3
SSE
15
3
SSE
15
3
SSE
14
3
SSE
14
3
S
14
3
S
14
2.5
SSW
15
2.5
SSW
15
2.5
SSW
15
2.5
SSW
15
2.5
SSW
16
2.5
SSW
15
2.5
SW
16
2.5
SW
16
2.5
SW
16
2.5
SW
16
2.4
SW
17
2.1
SW
16
Wave Graph
Metric surfscale
Energy kJ
3022
3253
4529
4003
4324
3826
2734
2985
3249
2976
3115
2629
2953
3560
3348
3178
3631
3417
3254
3134
2157
Wind (km/h)
30
NNE
25
ENE
30
NNE
30
NNE
20
ENE
15
NNE
15
NE
15
ESE
15
E
25
E
25
E
20
ESE
20
E
20
ESE
10
ENE
15
ENE
20
E
20
NE
30
NNE
25
NNE
30
NNE
Wind State
off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
off
High Tide
8:16PM1.52m
9:13AM1.29m
8:45PM1.49m
10:53AM1.19m
9:21PM1.45m
1:59PM1.22m
10:16PM1.41m
3:30PM1.34m
11:51PM1.39m
4:03PM1.45m
1:23AM1.43m
4:29PM1.53m
2:31AM1.50m
Low Tide
2:02PM0.72m
2:56AM0.61m
2:32PM0.89m
3:59AM0.60m
3:05PM1.06m
5:24AM0.57m
4:10PM1.21m
6:56AM0.49m
7:20PM1.27m
8:08AM0.39m
8:51PM1.22m
9:02AM0.28m
9:37PM1.13m
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
clear
rain showers
thunderstorm
clear
clear
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:50
4:52
4:52
4:52
4:54
4:54
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:39
6:38
6:37
6:37
6:36
6:35
 mm
2
7
2
2
Temp °C
26
27
23
27
28
25
29
29
26
28
27
26
28
28
26
27
28
24
26
28
23
Feels °C
24
26
21
27
29
27
33
31
29
28
27
28
29
29
29
28
29
24
23
27
21
  • 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 Uchiboso Surf forecast

The above surf forecast table for Uchiboso provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Uchiboso can be found by selecting the local surf guide option on the grey menu. Our Uchiboso 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 (Uchiboso) 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 Uchiboso 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.

Uchiboso is 7 km (4 miles) from the city of Tateyama. If you plan a holiday in Chiba, look for hotels and other accommodation in Tateyama. Tateyama has rooms for a wide range of budgets as well as car hire and transport links.

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