Surf Forecasts:
Big Ben surf forecast from 14 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 9PM (local time) - 4.5ft (1.4m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 3AM (local time) - 6ft (1.8m), 11s period, E swell with 764 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 9PM (local time) - 4.5ft (1.4m), 9s period with E swell.
Best Forecast Surf Conditions for Big Ben this week:
The surf forecast for Big Ben over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 9PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 1.6m and 7s. Another secondary swell of 0.5m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 1.8m 11s and forecast to arrive on Thursday (Aug 20) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 18th Aug) | 4.5ft (1.4m) 9s |
| Best Surf | 9PM (Tue 18th Aug) | 4.5ft (1.4m) 9s |
| Most Powerful | 3AM (Thu 20th Aug) | 6ft (1.8m) 11s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
Short Range ForecastModerate rain (total 10mm), heaviest on Fri night. Warm (max 27°C on Fri morning, min 23°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Tue afternoon. Warm (max 28°C on Wed morning, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 7 | E 10 | E 10 | E 10 | E 11 | E 11 | ENE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 663 | 580 | 618 | 510 | 440 | 384 | 301 | 234 | 224 | 194 | 189 | 287 | 234 | 229 | 251 | 484 | 494 | 546 | 588 | 441 | 255 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross |
High Tide | 6:02PM1.53m | 5:24AM1.59m | 6:22PM1.53m | 6:04AM1.56m | 6:42PM1.52m | 6:45AM1.49m | 7:03PM1.51m | 7:29AM1.39m | 7:24PM1.50m | 8:20AM1.27m | 7:46PM1.47m | 9:31AM1.15m | 8:09PM1.44m | ||||||||
Low Tide | 11:26AM0.18m | 11:38PM0.70m | 11:57AM0.26m | 00:10AM0.61m | 12:25PM0.38m | 00:43AM0.54m | 12:52PM0.51m | 1:20AM0.50m | 1:17PM0.66m | 2:01AM0.49m | 1:39PM0.82m | 2:52AM0.50m | 1:53PM0.97m | ||||||||
 |  |  |  | |  |  | |  | | | | | | | | | | | | | |
 | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — |
 | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — |
mm | 3 | 1 | 6 | — | — | — | — | — | — | 2 | — | — | — | 2 | — | 1 | 3 | — | 3 | — | — |
Temp °C | 27 | 27 | 25 | 27 | 27 | 24 | 27 | 27 | 24 | 27 | 27 | 25 | 27 | 27 | 25 | 28 | 28 | 25 | 26 | 27 | 24 |
Feels °C | 30 | 28 | 27 | 27 | 27 | 25 | 27 | 28 | 26 | 29 | 28 | 27 | 27 | 28 | 28 | 31 | 31 | 28 | 29 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | SSW 9 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | SSE 6 | SE 7 | E 7 | E 10 | SSE 7 | E 10 | SSE 7 | E 11 | ENE 10 |
| kJ | 663 | 580 | 32 | 510 | 440 | 384 | 301 | 234 | 224 | 194 | 189 | 287 | 20 | 35 | 251 | 369 | 38 | 546 | 42 | 441 | 255 |
Swell 2 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SE 10 | SSW 11 | SSW 10 | SSW 9 | SSW 9 | S 9 | ESE 9 | ESE 9 | ESE 8 | SE 11 | SE 11 | SE 10 | SSE 8 | SSE 7 | SE 10 | SSE 8 | SE 11 | SSE 7 | S 9 |
| kJ | 32 | 48 | 28 | 93 | 58 | 48 | 45 | 40 | 46 | 58 | 57 | 42 | 40 | 38 | 51 | 57 | 58 | 79 | 40 | 42 | 106 |
Swell 3 Height (m) Direction Period (s) | S 12 | SE 11 | SSW 12 | SSE 9 | SSE 8 | SSE 12 | ESE 10 | ESE 9 | S 8 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSE 9 | SE 10 | SE 10 | SSW 8 | SE 10 | SSW 10 | SSW 11 | SE 11 |
| kJ | 25 | 30 | 45 | 49 | 24 | 55 | 38 | 32 | 37 | 29 | 23 | 13 | 6 | 8 | 36 | 33 | 7 | 37 | 20 | 37 | 57 |
Wind waves Height (m) Direction Period (s) | — | — | E 10 | — | — | — | — | — | — | — | — | — | E 9 | E 9 | — | E 10 | E 10 | — | E 11 | — | — |
| kJ | — | — | 618 | — | — | — | — | — | — | — | — | — | 234 | 229 | — | 484 | 494 | — | 588 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 81 | 35 | 55 | 534 | 22 | 29 | 29 | 55 | 29 | 29 | 30 | 35 | 513 | 0 | 56 | 29 | 0 | 35 | 923 | 6 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big Ben 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 Big Ben Surf forecast
The above surf forecast table for Big Ben provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Ben can be found by selecting the local surf guide option on the grey menu. Our Big Ben 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 (Big Ben) 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 Big Ben 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.
Big Ben is 3 km (2 miles) from Kawaguchi. If you plan a holiday in Chiba, look for hotels and other accommodation in Kawaguchi. Kawaguchi has rooms for a wide range of budgets as well as car hire and transport links.
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