Surf Forecasts:
Big Ben surf forecast from 2 Aug 2026:
- Best quality surf: Monday 3 Aug, 9PM (local time) - 10ft (3.0m), 17s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 15ft (4.5m), 16s period, SE swell with 10,642 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 9PM (local time) - 10ft (3.0m), 17s period with SE 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 Monday (Aug 03) at 9PM. The primary swell is predicted to be 3.0m and 17s period with a secondary swell of 0.5m and 14s. Another secondary swell of 1.7m 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 4.5m 16s and forecast to arrive on Wednesday (Aug 05) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 3rd Aug) | 10ft (3.0m) 17s |
| Best Surf | 9PM (Mon 3rd Aug) | 10ft (3.0m) 17s |
| Most Powerful | 12PM (Wed 5th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here, let’s break down what’s on the menu for the next couple of weeks.
To be straight with you, the build-up is slow. There’s nothing worth paddling out for on Sunday the 2nd or Monday the 3rd. The swell is small and the wind is messy. Hold off until Tuesday the 4th of August, because that’s where things start to get interesting.
The standout window is Tuesday morning, 4th of August at Big Ben. We’re looking at a solid 11.5ft of SE swell, with a period of 16 seconds – that’s proper groundswell, long and powerful. The combined energy is massive (5844), so you’ll feel the weight. The wind is cross-off from the NNE at 19 mph, which means clean, lined-up faces. This is the genuine highlight of the whole forecast. The setup is a beach/jetty, but with that long period, expect it to be a bit straight and fast. It’s going to be too big for beginners – over 8ft is expert territory. The water is 81.1°, which is about normal for this time of year.
The swell stays big through Wednesday and Thursday, but the afternoon winds get lumpy and cross-shore, so the mornings are the go. After that, the size drops off and the wind turns more onshore. The second week is quieter, with smaller 4.6ft to 6.6ft swells and lighter winds, but nothing that really stands out as a clean, quality session.
Bottom line: Tuesday morning, 4th of August, is the one. Be there early.
Short Range ForecastMostly dry. Warm (max 29°C on Sun morning, min 22°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri night. Warm (max 29°C on Thu morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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) | ESE 16 | ESE 15 | ESE 15 | SE 16 | SE 17 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | S 15 | S 15 | S 15 | S 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 892 | 936 | 1368 | 2349 | 3610 | 4665 | 5321 | 7228 | 10290 | 10311 | 8972 | 7183 | 6150 | 6045 | 4869 | 3569 | 3268 | 2794 | 2303 | 1963 | 1956 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:20PM1.48m | 7:11AM1.41m | 7:42PM1.47m | 7:59AM1.30m | 8:06PM1.45m | 9:01AM1.18m | 8:31PM1.43m | 10:40AM1.08m | 9:01PM1.40m | 9:44PM1.36m | 4:28PM1.26m | 11:10PM1.33m | |||||||||
Low Tide | 12:53PM0.36m | 1:18AM0.62m | 1:22PM0.51m | 1:59AM0.58m | 1:49PM0.67m | 2:48AM0.56m | 2:13PM0.83m | 3:50AM0.55m | 2:28PM0.99m | 5:14AM0.52m | 6:50AM0.45m | 6:32PM1.25m | |||||||||
 |  |  | | |  | | | | | |  |  | |  | | | | | | | |
 | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — |
 | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 1 | 1 | — | 3 | 4 | 2 | — |
Temp °C | 29 | 28 | 24 | 25 | 26 | 23 | 26 | 24 | 23 | 27 | 27 | 25 | 29 | 29 | 26 | 29 | 28 | 26 | 28 | 28 | 25 |
Feels °C | 31 | 30 | 25 | 25 | 25 | 22 | 23 | 22 | 22 | 28 | 27 | 28 | 32 | 32 | 29 | 31 | 29 | 29 | 31 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 15 | ESE 15 | SE 16 | SE 17 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | S 15 | S 15 | S 15 | S 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | ESE 12 |
| kJ | 892 | 936 | 1368 | 2349 | 3610 | 4665 | 5321 | 7228 | 10290 | 10311 | 8972 | 7183 | 6150 | 6045 | 4869 | 3569 | 3268 | 2794 | 2303 | 1963 | 1237 |
Swell 2 Height (m) Direction Period (s) | SSW 5 | ENE 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | — | — | E 11 | E 10 | E 10 | ESE 10 | ESE 9 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | SSW 16 |
| kJ | 11 | 72 | 109 | 98 | 101 | 94 | 93 | 87 | 86 | — | — | 716 | 520 | 468 | 363 | 452 | 419 | 495 | 554 | 618 | 1956 |
Swell 3 Height (m) Direction Period (s) | ENE 16 | SSW 9 | SW 6 | E 14 | — | — | — | — | — | — | — | ENE 17 | ENE 16 | ENE 16 | ENE 15 | ENE 15 | ENE 15 | ENE 14 | ENE 14 | S 12 | S 12 |
| kJ | 82 | 29 | 5 | 97 | — | — | — | — | — | — | — | 27 | 25 | 51 | 46 | 42 | 42 | 41 | 40 | 71 | 45 |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 4 | NE 5 | NE 5 | NE 6 | ENE 7 | ENE 8 | ENE 8 | — | — | E 11 | — | — | — | ESE 10 | — | — | — | ESE 9 | — | — |
| kJ | 8 | 6 | 41 | 69 | 147 | 302 | 430 | 468 | — | — | 599 | — | — | — | 523 | — | — | — | 615 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 81 | 29 | 184 | 595 | 534 | 184 | 534 | 534 | 532 | 29 | 29 | 29 | 81 | 29 | 29 | 81 | 29 | 29 | 30 | 22 |
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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