Surf Forecasts:
Uchiboso surf forecast from 18 Sep 2026:
- Best quality surf: Saturday 19 Sep, 6PM (local time) - 8ft (2.5m), 13s period, SE swell with offshore winds.
- Most powerful swell: Monday 21 Sep, 6PM (local time) - 16ft (5.0m), 14s period, SSE swell with 9,749 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 6PM (local time) - 8ft (2.5m), 13s 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 Saturday (Sep 19) at 6PM. The primary swell is predicted to be 2.5m and 13s 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 5.0m 14s and forecast to arrive on Monday (Sep 21) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Saturday (Sep 19) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 19th Sep) | 8ft (2.5m) 13s |
| Best Surf | 6PM (Sat 19th Sep) | 8ft (2.5m) 13s |
| Most Powerful | 6PM (Mon 21st Sep) | 16ft (5.0m) 14s |
Table - best surf conditions forecast for Uchiboso over the next 16 days.
Short Range ForecastHeavy rain (total 202mm), heaviest during Mon afternoon. Warm (max 26°C on Sun night, min 21°C on Fri night). Winds increasing (moderate winds from the NNE on Sat night, gales from the N by Mon afternoon). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Mon night. Warm (max 25°C on Mon night, min 21°C on Wed night). Winds decreasing (near gales from the N on Mon night, calm by Tue morning). | ||||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | ||||||||||||||
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 14 | SE 15 | SE 14 | SE 12 | SE 12 | SSE 11 | SSE 12 | S 13 | S 14 | SSE 13 | ESE 10 | SSE 9 | SSE 8 | SSE 8 | E 9 | SE 6 | SSE 6 | SE 5 | SSE 5 |
Wave Graph  | |||||||||||||||||||
 kJ | 534 | 3178 | 2528 | 1797 | 1496 | 1114 | 2124 | 3966 | 7857 | 3340 | 187 | 116 | 51 | 19 | 198 | 18 | 13 | 14 | 10 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off |
High Tide | 12:44PM1.27m | 7:56PM1.42m | 2:45PM1.37m | 9:26PM1.32m | 3:00PM1.45m | 00:39AM1.32m | 3:20PM1.51m | 2:03AM1.43m | 3:40PM1.57m | 2:58AM1.54m | 4:01PM1.61m | ||||||||
Low Tide | 3:29AM0.53m | 1:38PM1.27m | 5:08AM0.58m | 7:19PM1.31m | 6:53AM0.55m | 8:27PM1.18m | 8:02AM0.49m | 8:56PM1.03m | 8:51AM0.43m | 9:23PM0.88m | 9:31AM0.41m | 9:51PM0.72m | |||||||
 |  |  |  |  | |  |  | |  |  | | | | |  | | | | |
 | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | — | 5:43 | — | — | 5:40 | — | — | 5:39 | — | — | 5:38 | — | — | 5:37 | — | — | 5:36 | — |
mm | — | — | — | 4 | 24 | 31 | 72 | 19 | 52 | 4 | 3 | 2 | — | — | — | — | — | — | 2 |
Temp °C | 21 | 23 | 24 | 22 | 21 | 21 | 26 | 26 | 24 | 25 | 24 | 23 | 23 | 23 | 24 | 23 | 22 | 24 | 24 |
Feels °C | 17 | 21 | 23 | 22 | 18 | 17 | 28 | 27 | 18 | 21 | 25 | 24 | 24 | 22 | 24 | 23 | 23 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 14 | SE 15 | SE 14 | SE 12 | SE 12 | SSE 11 | SSE 12 | S 13 | S 14 | SSE 13 | ESE 10 | SSE 9 | SSE 8 | SSE 8 | SSE 7 | SE 6 | SSE 6 | SSE 6 | SSE 5 |
| kJ | 534 | 3178 | 2528 | 1797 | 1496 | 1114 | 2124 | 3966 | 7857 | 3340 | 187 | 116 | 51 | 19 | 16 | 18 | 13 | 12 | 10 |
Swell 2 Height (m) Direction Period (s) | E 8 | — | — | — | E 14 | S 15 | E 12 | E 11 | — | — | SSE 10 | E 10 | E 10 | E 9 | SE 5 | E 9 | SE 8 | E 9 | E 9 |
| kJ | 13 | — | — | — | 15 | 106 | 72 | 85 | — | — | 140 | 48 | 16 | 7 | 5 | 7 | 3 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 7 | SW 7 | — | SE 9 | E 9 | S 8 | E 9 | SE 8 | SE 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 3 | 7 | 5 | 7 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 4 | NE 4 | ENE 8 | ENE 10 | NE 8 | NE 3 | NNE 4 | N 4 | N 5 | N 5 | — | — | ESE 4 | ESE 4 | E 9 | SE 5 | — | SE 5 | — |
| kJ | 12 | 4 | 270 | 122 | 9 | 2 | 14 | 23 | 62 | 129 | — | — | 3 | 4 | 198 | 13 | — | 14 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 484 | 501 | 484 | 503 | 566 | 566 | 524 | 523 | 523 | 52 | 0 | 0 | 536 | 811 | 1465 | 35 | 35 | 51 | 29 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Uchiboso surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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