Surf Forecasts:
Big Ben surf forecast from 22 Aug 2026:
- Best quality surf: Monday 24 Aug, 3AM (local time) - 3ft (0.9m), 12s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 12AM (local time) - 8ft (2.4m), 14s period, SSE swell with 2,297 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 9PM (local time) - 2.5ft (0.8m), 12s period with SSE 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 Sunday (Aug 23) at 9PM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.7m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 2.4m 14s and forecast to arrive on Tuesday (Aug 25) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 25) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 23rd Aug) | 2.5ft (0.8m) 12s |
| Best Surf | 3AM (Mon 24th Aug) | 3ft (0.9m) 12s |
| Most Powerful | 12AM (Tue 25th Aug) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it.
Alright, lookin' at the charts for the break, and I gotta be straight with you – the next week and a half is a bit of a tough one. There's swell on the way, but the timing and conditions are gonna be a real puzzle. The best window is a long way off, so you gotta be patient.
Let's start with what's closest. This whole first week, from Sunday the 23rd right through to the end of August, is a write-off. The swell is tiny, the wind is all over the shop, and everything is tagged as poor or marginal. You're lookin' at a solid 7 to 8 days of just not worth paddling out for. The wind is either cross or onshore, and the energy is weak. Save your energy.
We start to see a pulse of bigger swell roll in on Monday the 24th, with a very long period groundswell from the SSE. The combined energy jumps to 1463, which is a solid kick. But the wind is cross-on, and the forecast says the conditions are still marginal. The waves get bigger into Tuesday the 25th, with swell hitting 8 ft from the S and energy peaking at 2741, but again, that moderate cross-shore wind is gonna put a chop on it. These aren't the days to get excited about.
Things get a bit cleaner on Friday morning the 28th, with a cross-offshore wind and a 3 ft wave from the E, but the energy is low at 319. Still, it's a glimmer of hope.
The real standout, the one that has my heart racing a little, is way out there. We're looking at Monday the 7th of September. The forecast shows a proper 7 ft swell from the SE, and the wind is set to be a light, cross-offshore breeze from the WSW. That's the magic combo right there. The conditions are expected to be very good, and the energy is strong at 595. For a beach/jetty setup like Big Ben, a clean 7 ft wave with light offshore winds is about as good as it gets. The water temp is sitting at a nice 81°, which is pretty average for this time of year, so no surprises there.
Now, a couple of things to keep in mind. This swell has a short period of 8 seconds, so it's windswell, not a clean groundswell. It'll be a bit more crumbly and less powerful than a long-period swell, but with that offshore wind, it should still be fun. Also, Big Ben is an "inconsistent" break, so don't expect non-stop waves. You'll have to sit and wait for the sets. And because it's the best thing on offer, expect the crowds to be there, as it's a spot that "sometimes" gets busy.
The week before that, on Tuesday the 1st of September, we have a couple of promising sessions. The morning shows a 5 ft swell from the ESE with a cross breeze, and the afternoon has a clean cross-offshore wind with the same 5 ft swell. The energy is building into the 1000s, so it's a decent option. It's not the standout, but it's a solid backup.
So, to sum it up: the first week is a dud. The second week has some promise, but the one to circle on your calendar is Monday the 7th of September. That's your best bet for a clean, fun session at Big Ben.
Stay patient, and I'll see you in the water.
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Mon morning, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri morning. Warm (max 29°C on Wed morning, min 23°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | ENE 10 | SSE 13 | SSE 13 | SSE 14 | SSE 16 | SSE 14 | S 14 | S 13 | S 13 | SSW 12 | SSW 13 | S 9 | SW 12 | S 9 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 |
Wave Graph | |||||||||||||||||||||
125 | 106 | 209 | 670 | 2007 | 2297 | 2103 | 1693 | 1181 | 589 | 543 | 318 | 254 | 198 | 212 | 190 | 184 | 139 | 134 | 94 | 89 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-on | cross-on | cross-on |
High Tide | 4:10PM1.33m | 00:01AM1.29m | 4:16PM1.41m | 1:46AM1.34m | 4:31PM1.46m | 2:51AM1.43m | 4:50PM1.50m | 3:40AM1.52m | 5:08PM1.52m | 4:23AM1.58m | 5:27PM1.54m | 5:03AM1.61m | 5:47PM1.54m | ||||||||
Low Tide | 8:35PM1.23m | 8:26AM0.35m | 9:17PM1.13m | 9:13AM0.27m | 9:46PM1.02m | 9:53AM0.22m | 10:14PM0.89m | 10:28AM0.21m | 10:42PM0.76m | 10:59AM0.24m | 11:10PM0.64m | 11:29AM0.31m | 11:40PM0.54m | ||||||||
5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | |
— | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 2 | — | — | — | — |
Temp °C | 27 | 27 | 25 | 29 | 29 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 27 | 24 | 24 | 26 | 26 | 25 |
Feels °C | 30 | 30 | 30 | 32 | 31 | 29 | 30 | 29 | 29 | 30 | 30 | 29 | 31 | 29 | 28 | 29 | 24 | 25 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | ENE 9 | SSE 13 | SSE 14 | SSE 16 | SSE 14 | S 14 | S 13 | S 13 | SSW 12 | SSW 13 | SSW 12 | S 9 | SW 11 | S 9 | S 8 | S 8 | E 12 | SSW 9 | SSW 9 | E 6 |
125 | 88 | 209 | 621 | 2007 | 2297 | 2103 | 1693 | 1181 | 589 | 543 | 314 | 201 | 153 | 164 | 89 | 84 | 139 | 108 | 84 | 62 | |
Swell 2 Height (m) Direction Period (s) | SSW 9 | ESE 12 | E 12 | SSE 18 | E 12 | E 15 | E 14 | E 13 | E 13 | SSE 10 | SSE 9 | E 12 | SW 12 | E 13 | E 13 | E 12 | E 12 | S 8 | E 12 | E 11 | SSW 10 |
30 | 83 | 104 | 670 | 175 | 267 | 311 | 225 | 215 | 122 | 130 | 134 | 202 | 128 | 212 | 190 | 184 | 61 | 134 | 94 | 72 | |
Swell 3 Height (m) Direction Period (s) | ESE 13 | SSE 13 | E 9 | E 12 | SSW 8 | E 15 | E 14 | SW 10 | SSE 10 | E 12 | E 12 | S 11 | E 14 | E 10 | SW 11 | SSE 10 | SSE 10 | SW 10 | SE 11 | SE 11 | E 11 |
54 | 106 | 59 | 172 | 7 | 109 | 306 | 15 | 42 | 148 | 138 | 57 | 102 | 52 | 75 | 37 | 36 | 48 | 30 | 31 | 89 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | ENE 3 | — | — | SW 9 | SW 9 | SW 4 | SW 4 | SW 4 | SW 4 | SSW 4 | S 9 | SSW 9 | S 9 | — | NE 3 | NE 3 | ENE 4 | ENE 5 | E 6 | — |
1 | 1 | — | — | 29 | 46 | 21 | 10 | 11 | 12 | 18 | 318 | 254 | 198 | — | 3 | 4 | 6 | 36 | 57 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 22 | 0 | 18 | 35 | 81 | 70 | 561 | 70 | 70 | 534 | 81 | 35 | 81 | 121 | 35 | 29 | 22 | 29 | 29 | 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.











