Surf Forecasts:
Big Ben surf forecast from 29 Jul 2026:
- Best quality surf: Monday 3 Aug, 12PM (local time) - 10ft (3.0m), 18s period, SE swell with cross-shore winds.
- Most powerful swell: Wednesday 5 Aug, 3PM (local time) - 16ft (5.0m), 16s period, SSE swell with 13,379 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 3AM (local time) - 2.5ft (0.7m), 7s 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 Thursday (Jul 30) at 3AM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.4m and 10s. 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 5.0m 16s and forecast to arrive on Wednesday (Aug 05) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 30th Jul) | 2.5ft (0.7m) 7s |
| Best Surf | 12PM (Mon 3rd Aug) | 10ft (3.0m) 18s |
| Most Powerful | 3PM (Wed 5th Aug) | 16ft (5.0m) 16s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, folks, Rusty here again with the same picture, just in feet and miles per hour.
The first week starts off with small, weak, wind-chopped surf. Thursday the 30th has 2ft swell from the SSW, period about 6 seconds, and energy is tiny – only 69. It’s glassy in the morning, but there’s just not enough push. Friday and Saturday are more of the same, poor and messy. The best early option is Sunday the 2nd of August. The swell jumps to 5ft from the ESE, with a 16-second period and energy hitting 1118. Winds are light cross-onshore, so it’s not perfect, but it’s the most promising of the first few days.
Then it gets serious. By Monday the 3rd, we’ve got 8ft ESE swell with a 17-second period and energy at 4307. That’s a solid groundswell, but a moderate breeze puts a cross-chop on it. Tuesday the 4th brings 13ft SE swell, energy screaming at 9045. Wind is moderate cross-shore, and the forecast says the swell is too big for this break – this is expert-only, over 8ft and it’s a beast. Wednesday and Thursday the 5th and 6th keep pumping 13ft to 16ft SSE swell, with energy in the 12,000 to 13,800 range. Massive, powerful, long-period swells, but the wind is cross-onshore and the size is intimidating.
The second week is still chunky but starts to ease. Friday the 7th has 10ft SSW swell, 15-second period, energy still over 4000. Wind is cross-onshore. Saturday the 8th sees 6ft to 7ft swell, energy around 3300 to 4000. Wind stays cross-onshore, so it’s not the cleanest, but the size is more manageable. The real gem comes on Wednesday the 12th of August. Morning brings a glassy, offshore westerly wind, with 6ft ENE swell, 12-second period, and energy of 966. That’s clean, lined-up, and perfect for a beach/jetty setup. The best session of the fortnight, no question. After that, the swell drops off through the 13th and 14th, with smaller 4ft to 3ft swell and choppy cross-shore winds.
Water temperature is about average for this time of year. The break is inconsistent, so don’t expect a steady run, but when it hits, it’s worth it. Beginners should stick to the 5ft day on Sunday the 2nd. For everyone else, that Wednesday the 12th morning with glassy conditions is the standout. Crowds can show up sometimes, so be ready.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Thu morning, min 26°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 31°C on Sun morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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) | SSW 7 | SE 10 | SE 10 | SW 6 | SSW 6 | SSW 6 | E 11 | SE 15 | SE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 16 | ESE 17 | ESE 18 | SE 17 | SE 16 | SE 17 | SE 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 61 | 32 | 33 | 58 | 60 | 30 | 20 | 56 | 124 | 275 | 1027 | 1273 | 1928 | 4206 | 5795 | 6709 | 8913 | 11833 | 10836 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | glassy | cross | on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 4:19AM1.53m | 6:13PM1.51m | 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 | |||||||
Low Tide | 11:02PM0.94m | 11:20AM0.08m | 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 | ||||||
 |  | |  | |  | | | | | | |  | | | | | | | |
 | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — |
 | 6:45 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 28 | 31 | 30 | 27 | 31 | 30 | 26 | 29 | 29 | 26 | 31 | 30 | 27 | 27 | 27 | 24 | 28 | 27 | 25 |
Feels °C | 32 | 34 | 33 | 31 | 34 | 33 | 30 | 33 | 33 | 31 | 35 | 33 | 31 | 28 | 27 | 25 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 6 | SE 10 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | ESE 11 | SE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 16 | ESE 17 | ESE 18 | SE 17 | SE 16 | SE 17 | SE 16 |
| kJ | 61 | 32 | 24 | 33 | 60 | 30 | 15 | 39 | 124 | 275 | 1027 | 1273 | 1928 | 4206 | 5795 | 6709 | 8913 | 11833 | 10836 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | E 8 | SE 10 | SE 9 | SE 9 | E 11 | NE 8 | E 11 | ESE 10 | ENE 16 | ENE 15 | E 15 | E 14 | E 14 | E 14 | E 14 | — | E 13 |
| kJ | 33 | 23 | 13 | 24 | 14 | 14 | 20 | 9 | 59 | 80 | 82 | 72 | 109 | 101 | 98 | 94 | 132 | — | 86 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | ENE 12 | ENE 8 | ENE 8 | ENE 8 | NE 8 | SE 15 | SE 8 | ENE 16 | SSE 10 | SSE 9 | — | — | — | — | — | — | — |
| kJ | 14 | 14 | 14 | 14 | 13 | 13 | 9 | 56 | 11 | 83 | 9 | 17 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 6 | SW 6 | — | E 3 | ENE 3 | ESE 4 | SE 4 | SE 4 | — | — | E 7 | — | — | ESE 6 | — | — | — |
| kJ | — | — | 33 | 58 | — | 3 | 2 | 10 | 8 | 8 | — | — | 14 | — | — | 50 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 35 | 0 | 6 | 114 | 557 | 557 | 30 | 0 | 22 | 30 | 29 | 29 | 29 | 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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