Surf Forecasts:
Big Ben surf forecast from 31 Aug 2026:
- Best quality surf: Monday 7 Sep, 6AM (local time) - 10ft (3.0m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 9PM (local time) - 11ft (3.5m), 12s period, SSE swell with 3,546 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 0.5m and 10s. Another secondary swell of 0.9m 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 3.5m 12s and forecast to arrive on Monday (Sep 07) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Friday (Sep 04) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 1st Sep) | 3ft (0.9m) 12s |
| Best Surf | 6AM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 9PM (Mon 7th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming down the line for Big Ben.
Right off the bat, we’ve got a rough start. The first few days are a write-off with poor surf conditions, so you’re looking at a gap of no real surf until the morning of Wednesday, 2nd September. That’s your first real chance to get wet.
The water temp is sitting at 83°F, which is a touch warmer than normal for this time of year, so you can leave the rubber at home.
Wednesday morning, 2nd September, is the standout early on. It’s glassy, with a light 3ft swell from the east, period of 10 seconds. The combined energy is moderate at 227. It’s not big, but it’ll be clean and fun for a beginner-friendly spot like Big Ben. The wind is absolutely dead calm – that’s a major positive. Keep in mind this break is inconsistent, so you’ll have to be patient for the sets.
The rest of that week and into the weekend is a bit messy with onshore winds and choppy conditions. The swell does pick up, but the wind kills it.
Now, look ahead to Monday morning, 7th September. There’s a big pulse of swell coming in at 10ft from the east, with a period of 9 seconds and a combined energy of 2053 – that’s strong. However, the guidance tells us this swell is predicted to be too big for this break. The wind is offshore and clean, but the size is expert-only territory. If you’re not a pro, give it a miss.
The period from the 8th to the 9th of September sees dropping swell, but still some clean, offshore winds. The best of that run is Wednesday afternoon, 9th September, with 6ft from the SSE, period of 11 seconds, and combined energy of 869. That’s moderate energy, and the wind is clean. It’s a solid session for the more experienced surfers, as the swell is pushing over 5ft.
After that, it’s a long stretch of poor to marginal conditions, with strong onshore winds and a lot of stormy weather on the 10th and 11th. The swell is big but messy. The whole second week takes a dive, with mostly onshore wind and choppy surf. You’ll be waiting until the 14th of September for a chance at something, but it’s small and onshore – not worth the drive.
The best call in the whole outlook is the Wednesday morning, 2nd September. Glassy, small, and clean. It’s the only true winner.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 29°C on Thu morning, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 61mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 20°C on Fri afternoon). Winds increasing (light winds from the SW on Thu night, fresh winds from the NE by Sun morning). | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SE 7 | SSW 10 | ENE 6 | E 6 | E 7 | E 8 | ENE 7 | ENE 8 | ENE 8 | E 8 |
Wave Graph | ||||||||||||||||||||
145 | 208 | 228 | 295 | 235 | 167 | 125 | 151 | 125 | 94 | 82 | 74 | 98 | 143 | 491 | 566 | 512 | 640 | 787 | 908 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-off | glassy | cross-on | cross-on | cross | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 6:26PM1.55m | 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 | — | — | — | — | — | — | — | — | 1 | — | 4 | 3 | 22 | 25 | 6 | — | 1 | — | — | — |
Temp °C | 25 | 24 | 26 | 26 | 24 | 27 | 27 | 26 | 29 | 29 | 26 | 23 | 21 | 20 | 21 | 22 | 22 | 25 | 25 | 22 |
Feels °C | 25 | 25 | 27 | 28 | 27 | 29 | 30 | 31 | 31 | 31 | 30 | 23 | 20 | 18 | 20 | 20 | 20 | 21 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SE 7 | SE 7 | SE 7 | E 6 | SSW 8 | SSE 13 | SSE 11 | SSE 11 | SSE 11 | SSE 11 |
145 | 208 | 228 | 295 | 235 | 167 | 125 | 151 | 125 | 94 | 82 | 64 | 54 | 143 | 22 | 101 | 353 | 613 | 581 | 334 | |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | SSW 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | S 9 | S 9 | SE 6 | E 10 | SSW 10 | SSW 10 | SSW 9 | SW 9 | SW 9 | SW 9 | SSW 11 | SW 10 | SW 10 |
57 | 59 | 14 | 59 | 46 | 36 | 31 | 38 | 73 | 29 | 68 | 74 | 72 | 66 | 14 | 13 | 13 | 11 | 4 | 4 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SSW 8 | ENE 11 | SSW 8 | SSW 8 | SSW 8 | E 13 | ENE 7 | E 6 | SSW 10 | SSW 11 | E 9 | E 9 | E 10 | ENE 13 | SSW 8 | ENE 12 | ENE 12 | S 11 | — |
30 | 14 | 24 | 14 | 14 | 24 | 83 | 27 | 26 | 18 | 68 | 41 | 41 | 28 | 17 | 7 | 15 | 14 | 9 | — | |
Wind waves Height (m) Direction Period (s) | NE 6 | ENE 7 | ENE 8 | — | — | — | — | — | — | S 8 | NE 5 | ENE 5 | ENE 6 | NNE 5 | E 7 | E 8 | ENE 7 | ENE 8 | ENE 8 | E 8 |
68 | 78 | 88 | — | — | — | — | — | — | 33 | 33 | 42 | 98 | 45 | 491 | 566 | 512 | 640 | 787 | 908 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 35 | 35 | 22 | 29 | 0 | 0 | 30 | 30 | 39 | 30 | 24 | 29 | 29 | 609 | 595 | 595 | 595 | 513 | 534 | 595 |
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.











