Surf Forecasts:
Big Ben surf forecast from 30 Jul 2026:
- Best quality surf: Monday 3 Aug, 3PM (local time) - 10ft (3.0m), 18s period, SE swell with cross-shore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 16ft (5.0m), 17s period, SSE swell with 14,647 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 6AM (local time) - 3ft (0.9m), 6s period with SSW 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 Friday (Jul 31) at 6AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.3m and 10s. 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 5.0m 17s and forecast to arrive on Wednesday (Aug 05) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Wednesday (Aug 05) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 31st Jul) | 3ft (0.9m) 6s |
| Best Surf | 3PM (Mon 3rd Aug) | 10ft (3.0m) 18s |
| Most Powerful | 12PM (Wed 5th Aug) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m not gonna sugarcoat it – the next couple of days are a write-off for a proper surf. Friday the 31st and Saturday the 1st of August are flat, messy, or just plain poor. You’re better off staying home and waxing up your board for later.
The first real glimmer of hope comes on Sunday morning, August 2nd, at Big Ben. This is our standout. We’re looking at a clean 5ft swell from the SE, and the wind is dead glassy – absolutely perfect conditions. The combined swell energy is a strong 1118, so there’s proper grunt behind it. With a long period of 16 seconds, it’s groundswell, so expect clean lines and long lulls between sets. It’s a beach/jetty setup, but long period swells can sometimes race down the beach. Crowds are *sometimes* a problem here, so get out early for the best of it. Water temp’s bang on average for this time of year.
Sunday afternoon gets a bit bumpy with a cross-onshore breeze, and from Monday the 3rd through to the 7th, the swell just gets too big for this spot – we’re talking 8ft to a massive 16ft with combined energy readings up to 13796. That’s expert-only territory, and even then, the winds are mostly cross or cross-on making it a real handful. Honestly, by Wednesday and Thursday, with that much wind and swell, it’s looking more like a kite-surfing zone than a paddle session.
A bit of a reset comes Saturday the 8th, but the surf is just average with messy onshore winds. The next window that’s really worth a look is Wednesday morning, August 12th. We get a clean 5ft E/ENE swell with light cross-offshore winds from the NNE. Combined energy is moderate at 664, and it’s clean. It’s not a massive day, but it’s the best, most user-friendly option after the big stuff settles. Unfortunately, the rest of that week fades into poor wind and junky conditions all the way through to the 15th.
So to wrap it up: your absolute best bet is Sunday morning, August 2nd at Big Ben for the glassy, long-period groundswell. Wednesday the 12th is your second look, more of a cruisy, fun-sized alternative. The rest of the 16-day window is mostly blown out or too big.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Sat morning, min 26°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | SW 6 | SSW 6 | SSW 6 | E 11 | ESE 11 | SE 16 | ESE 18 | SE 16 | ESE 15 | ESE 15 | ESE 17 | SE 18 | SE 18 | SE 17 | SE 17 | SE 16 | SE 17 | SSE 17 | SSE 17 |
Wave Graph  | |||||||||||||||||||
 kJ | 106 | 55 | 43 | 20 | 40 | 124 | 217 | 1031 | 936 | 1592 | 3376 | 4714 | 6707 | 7984 | 9543 | 8820 | 13198 | 13393 | 13152 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-on | cross |
High Tide | 5:03AM1.55m | 6:35PM1.50m | 5:45AM1.54m | 6:57PM1.49m | 6:27AM1.49m | 7:20PM1.48m | 7:11AM1.41m | 7:42PM1.47m | 7:59AM1.30m | 8:06PM1.45m | 9:01AM1.18m | 8:31PM1.43m | |||||||
Low Tide | 11:34PM0.85m | 11:52AM0.14m | 00:07AM0.76m | 12:24PM0.23m | 00:41AM0.69m | 12:53PM0.36m | 1:18AM0.62m | 1:22PM0.51m | 1:59AM0.58m | 1:49PM0.67m | 2:48AM0.56m | 2:13PM0.83m | |||||||
 |  | | | |  | | | | | | | | | | | | |  | |
 | — | 4:47 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — |
 | 6:45 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 30 | 29 | 26 | 31 | 30 | 28 | 31 | 30 | 24 | 27 | 26 | 24 | 27 | 26 | 23 | 27 | 27 | 25 |
Feels °C | 31 | 33 | 33 | 31 | 35 | 33 | 34 | 35 | 33 | 25 | 28 | 26 | 25 | 26 | 25 | 23 | 27 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SSW 6 | SSW 6 | SSW 6 | ESE 11 | SE 16 | SE 15 | SE 16 | ESE 15 | ESE 15 | ESE 17 | SE 18 | SE 18 | SE 17 | SE 17 | SE 16 | SE 17 | SSE 17 | SSE 17 |
| kJ | 60 | 55 | 43 | 15 | 40 | 124 | 217 | 1031 | 936 | 1592 | 3376 | 4714 | 6707 | 7984 | 9543 | 8820 | 13198 | 13393 | 13152 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 9 | SE 9 | NE 8 | SW 6 | S 6 | ESE 18 | ENE 16 | ENE 15 | E 15 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 11 | — | E 10 |
| kJ | 15 | 14 | 14 | 15 | 8 | 17 | 209 | 82 | 72 | 109 | 101 | 101 | 94 | 92 | 87 | 86 | 188 | — | 347 |
Swell 3 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | E 11 | NE 8 | E 11 | ESE 10 | ENE 7 | S 9 | — | — | — | — | — | — | — | — | — | — |
| kJ | 14 | 13 | 14 | 20 | 15 | 59 | 55 | 5 | 16 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | — | — | — | — | — | — | — | NE 7 | NE 5 | NE 5 | NE 5 | ENE 7 | NE 7 | NE 7 | NE 7 | NE 6 | E 11 | — |
| kJ | 106 | — | — | — | — | — | — | — | 12 | 41 | 51 | 60 | 145 | 188 | 194 | 91 | 136 | 403 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 6 | 30 | 0 | 0 | 30 | 0 | 0 | 22 | 29 | 29 | 29 | 29 | 29 | 48 | 29 | 29 | 48 | 29 |
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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