Surf Forecasts:
Big Ben surf forecast from 31 Aug 2026:
- Best quality surf: Monday 7 Sep, 3AM (local time) - 10ft (3.0m), 9s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 12PM (local time) - 10ft (3.0m), 9s period, ENE swell with 1,597 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 6AM (local time) - 3ft (0.9m), 12s period with ESE 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 (Sep 01) at 6AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.9m and 7s. Another secondary swell of 1.1m and 7s 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 3.0m 9s and forecast to arrive on Monday (Sep 07) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Sep 05) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 1st Sep) | 3ft (0.9m) 12s |
| Best Surf | 3AM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 12PM (Mon 7th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here again, lookin’ at Big Ben. This is a beach/jetty number, exposed to the swell, built for beginners, but it’s an inconsistent joint. Water’s about average temp for September.
The first couple of days? Not much. Tuesday, September 1st, is a dud. Wednesday the 2nd morning shows a little life with some glassy conditions and a 4ft easterly swell, 10-second period. That’s clean – a big plus – but the combined energy is only moderate (298), and it’s not a winner. A chance for a beginner to grab some tiny, tidy waves.
Then it goes sour. From Thursday the 3rd through the rest of the week, it’s rain, onshore wind, and chop. The swell grows but gets trashed. Monday the 7th has clean cross-off wind, but the swell hits 10ft – way too big for beginners and heavy for anyone. Combined energy is very strong (1688), but it’s an expert-only affair.
Second week is a bust. From the 8th onward, there’s clean wind now and then, but the swell stays over 7ft, often with lumpy cross-chop or onshore wind. Wednesday the 9th throws a massive 13ft SE swell with a 13-second period, and the energy is huge (6219), but it’s cross-onshore and choppy. Not surfable. Through to the 16th, it’s constant poor conditions, mostly with onshore winds and storm threats.
The only real standout? There isn’t one. Wednesday morning the 2nd is the cleanest soft option for the beginner, but it’s small. The bigger pulses are either too big, badly timed, or all chopped up. This spot is a fickle beast, and the forecast ain’t on its side.
If you’re a beginner, check the 2nd morning. For the rest of us, it’s a pass. Things can turn, but right now it’s lean.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu morning. Warm (max 28°C on Wed morning, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 175mm), heaviest during Fri night. Warm (max 24°C on Thu night, min 19°C on Fri afternoon). Mainly fresh winds. | ||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SSW 11 | SSW 10 | SSW 10 | SE 7 | E 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | E 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 208 | 228 | 295 | 338 | 249 | 125 | 191 | 125 | 94 | 97 | 74 | 72 | 100 | 176 | 142 | 326 | 614 | 823 | 1183 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-off | glassy | on | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 7:02AM1.47m | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | 8:08PM1.35m | 3:59PM1.32m | 10:09PM1.26m | ||||||||
Low Tide | 00:45AM0.42m | 12:48PM0.68m | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | 4:21AM0.52m | 6:15AM0.51m | 8:43PM1.26m | ||||||||
 |  |  |  | |  | |  | |  |  | |  | |  |  | | |  | |
 | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — |
 | 6:08 | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | 3 | — | 8 | 19 | 39 | 88 | 20 | 1 | — | — | — | 1 |
Temp °C | 24 | 26 | 26 | 24 | 28 | 28 | 26 | 28 | 27 | 24 | 22 | 19 | 19 | 20 | 21 | 22 | 24 | 24 | 22 |
Feels °C | 25 | 27 | 28 | 26 | 31 | 31 | 30 | 31 | 30 | 26 | 23 | 17 | 16 | 19 | 18 | 20 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SE 7 | SE 7 | SE 7 | SE 7 | SW 9 | E 9 | SSE 12 | SSE 10 | SSE 10 | SSE 11 |
| kJ | 208 | 228 | 295 | 338 | 249 | 125 | 191 | 125 | 94 | 54 | 65 | 62 | 100 | 21 | 25 | 14 | 68 | 114 | 119 |
Swell 2 Height (m) Direction Period (s) | E 11 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | ENE 7 | ENE 7 | S 9 | SE 6 | E 10 | SSW 10 | SSW 10 | SSW 9 | SSW 8 | SE 7 | ENE 12 | SSE 12 | SSW 10 | SW 10 |
| kJ | 59 | 14 | 14 | 14 | 24 | 26 | 29 | 54 | 31 | 68 | 74 | 72 | 66 | 13 | 17 | 15 | 48 | 10 | 4 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | ENE 11 | SE 10 | SE 10 | SE 10 | E 13 | S 9 | E 6 | S 8 | SSW 11 | E 9 | E 9 | E 9 | ENE 13 | SW 9 | SSW 9 | SW 10 | NE 12 | SW 10 |
| kJ | 14 | 24 | 16 | 15 | 25 | 83 | 38 | 23 | 33 | 97 | 60 | 60 | 41 | 17 | 21 | 8 | 17 | 6 | 16 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 7 | NE 7 | — | — | — | — | — | NE 4 | — | NE 5 | NNE 3 | E 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | E 9 |
| kJ | 78 | 88 | 66 | 86 | — | — | — | — | — | 12 | — | 7 | 4 | 176 | 142 | 326 | 614 | 823 | 1183 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 35 | 6 | 29 | 0 | 0 | 30 | 30 | 30 | 30 | 29 | 29 | 595 | 595 | 595 | 595 | 273 | 273 | 530 | 273 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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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