
Surf Forecasts:
Big Ben surf forecast from 10 Sep 2026:
- Best quality surf: Friday 11 Sep, 3AM (local time) - 4ft (1.2m), 7s period, ENE swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 3AM (local time) - 3.5ft (1.0m), 19s period, SE swell with 723 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 3AM (local time) - 4ft (1.2m), 7s period with ENE 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 (Sep 11) at 3AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.7m and 8s. Another secondary swell of 0.5m and 14s 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 1.0m 19s and forecast to arrive on Friday (Sep 18) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 7s period and expected on Friday (Sep 11) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 11th Sep) | 4ft (1.2m) 7s |
| Best Surf | 3AM (Fri 11th Sep) | 4ft (1.2m) 7s |
| Most Powerful | 3AM (Fri 18th Sep) | 3.5ft (1.0m) 19s |
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 cooking for Big Ben over the next couple of weeks.
First thing’s first – the water temp at Big Ben is running pretty much what you’d expect for this time of year, nothing freaky going on there.
Right off the bat, we’ve got a patch of small but rideable waves kicking off Friday the 11th. It’s not gonna blow your mind – we’re talking knee-high, 2ft easterly swell, but the wind gets clean enough on Friday afternoon that you could have a fun little session. The energy is pretty weak, sitting at 196 (moderate wave energy). It’s a beginner-friendly spot, and an inconsistent one at that, so when it does break, you’ll want to make the most of it. Crowds are a possibility here, but with waves this size, it’s not gonna be a zoo.
Things clean up nicely into Saturday the 12th. The swell nudges up to 2ft-3ft from the east and the wind goes cross-offshore with a light breeze. The energy bumps up nicely to 258 on Saturday morning and 325 (moderate) by the afternoon. It’s not big, but it’s clean and should be pretty user-friendly. This is the best bet of this first window.
Sunday the 13th morning holds that same fun size, 3ft from the east, with light cross-off wind and an energy reading of 364 (moderate). It’ll be worth a paddle before the wind switches onshore later in the day. After that, the conditions get a bit ordinary through to Tuesday the 15th, with the wind coming onshore or cross-shore and the swell getting a little messy.
Then, Wednesday the 16th morning is a real treat. The wind goes glassy, dead calm at 0 mph. The swell is 3ft from the east-northeast with a period of 13 seconds, giving it some nice shape. The combined energy is 415 (moderate). For a beach/jetty setup, that longer period might make it a little straight, but with glassy conditions, it’s a genuine standout for the cleaner, mellow surfer.
Into the following week, Thursday the 17th morning also delivers glassy conditions with a 2ft easterly swell and a period of 12 seconds. Energy is 212 (moderate). Again, tiny but perfect if you’ve got a log.
Now, hold onto your boardies. From Friday the 18th, the real power shows up. We start seeing a solid SE groundswell pushing in, 7ft on Friday morning ramping up to 8ft by the afternoon, with a very long period of 16 seconds. The energy skyrockets to 4608 (very strong wave energy). The wind stays favorable, cross-off from the north-northeast. BUT – this is a big one for a beginner spot. That’s expert territory, especially with that long period swell. For the experienced crew, this could be a highlight, but it’s a beast.
Saturday the 19th through Monday the 21st is where it gets massive. We’re looking at 10ft to 13ft swell from the southeast and south-southeast. The energy readings are huge – up to 6320 (very strong). The wind is still okay, cross-off or cross-shore, but these waves are well over 8ft. This is strictly for big-wave chargers only. It’s also worth noting that at this size, with the wind likely to be cross-shore and the break being a beach/jetty, this setup looks more interesting for kite surfing than paddle surfing.
Tuesday the 22nd morning peaks at a monstrous 23ft from the south-southwest with an energy of 17426 (very strong). That’s the biggest of the whole run, and it’s glassy. But unless you’re a pro with a watercraft, don’t even think about it.
After that, a big storm system messes things up. Wednesday the 23rd and Thursday the 24th see the swell drop fast, but the wind goes strong onshore or cross-onshore, up to 25 mph. It’s messy and unpleasant. There’s a glimmer on Thursday afternoon with a glassy 2ft from the south, but it’s weak.
We finish the outlook on Saturday the 26th with a 3ft south-southeast swell, but the wind is a moderate cross-shore breeze, and the conditions are poor. That’s a gap of poor to fair conditions from the 23rd through to the end.
So, to wrap it up: the absolute standout window is Saturday the 12th through Sunday the 13th morning for clean, small fun waves. For the big dog experts, Friday the 18th morning has the best combo of size and clean wind. Everything else is either too small, too big, or too windy.
Stay stoked.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Fri morning. Warm (max 25°C on Sun morning, min 19°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Tue morning. Warm (max 28°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 7 | E 14 | E 14 | E 14 | E 14 | E 13 | ESE 13 | E 13 | E 13 | E 12 | E 12 | SE 10 | E 14 | E 14 | E 14 | E 13 | ENE 13 | E 12 | ENE 12 |
Wave Graph | |||||||||||||||||||
154 | 144 | 140 | 183 | 180 | 289 | 295 | 272 | 273 | 239 | 235 | 231 | 315 | 383 | 411 | 280 | 286 | 251 | 192 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | glassy | cross-on | cross-on | cross | cross | cross | cross-off | glassy | cross-on | cross |
High Tide | 4:02AM1.57m | 4:53PM1.53m | 4:42AM1.62m | 5:12PM1.55m | 5:20AM1.63m | 5:30PM1.56m | 5:58AM1.59m | 5:50PM1.57m | 6:37AM1.52m | 6:10PM1.56m | 7:20AM1.42m | 6:29PM1.55m | |||||||
Low Tide | 10:15PM0.72m | 10:31AM0.32m | 10:42PM0.59m | 11:01AM0.38m | 11:11PM0.48m | 11:29AM0.47m | 11:41PM0.39m | 11:55AM0.58m | 00:13AM0.33m | 12:20PM0.71m | 00:48AM0.32m | 12:42PM0.84m | 1:26AM0.34m | ||||||
— | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | |
— | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:49 | — | — | 5:47 | — | — | 5:45 | — | |
mm | — | 1 | 1 | 3 | — | — | — | — | — | — | 1 | — | 1 | 2 | — | 1 | 1 | 2 | 2 |
Temp °C | 20 | 21 | 20 | 20 | 21 | 22 | 21 | 25 | 25 | 25 | 28 | 28 | 26 | 25 | 24 | 24 | 25 | 24 | 24 |
Feels °C | 19 | 21 | 21 | 21 | 23 | 24 | 23 | 29 | 29 | 30 | 31 | 31 | 29 | 26 | 28 | 28 | 30 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | E 14 | E 14 | E 13 | ESE 13 | E 13 | E 13 | E 12 | SE 9 | SE 10 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | E 12 | ESE 8 |
82 | 57 | 41 | 183 | 180 | 289 | 295 | 272 | 273 | 239 | 135 | 231 | 201 | 191 | 177 | 178 | 128 | 251 | 95 | |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | E 14 | S 8 | S 7 | SSW 7 | ENE 6 | SE 9 | SE 8 | SE 7 | E 12 | E 12 | E 14 | E 14 | E 14 | E 13 | ENE 13 | SE 7 | ENE 12 |
100 | 144 | 140 | 41 | 28 | 18 | 15 | 37 | 75 | 57 | 235 | 193 | 315 | 383 | 411 | 280 | 286 | 75 | 192 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 10 | ENE 5 | SE 10 | ESE 9 | — | SSW 7 | NE 6 | ENE 6 | NE 6 | NE 6 | ENE 15 | ENE 8 | ENE 8 | ENE 10 | ENE 10 | NNE 6 | SE 8 | SE 8 |
14 | 36 | 15 | 24 | 32 | — | 9 | 19 | 17 | 10 | 10 | 78 | 6 | 12 | 18 | 35 | 3 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | NNE 7 | ENE 5 | NE 5 | NE 6 | — | NE 6 | — | — | — | SW 7 | SW 7 | — | — | — | NE 5 | NE 4 | NNE 4 |
154 | 43 | 47 | 17 | 18 | 18 | — | 36 | — | — | — | 2 | 2 | — | — | — | 1 | 6 | 10 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 35 | 0 | 0 | 0 | 0 | 0 | 0 | 35 | 0 | 29 | 30 | 121 | 35 | 30 | 0 | 0 | 35 | 6 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










