
Surf Forecasts:
E-Bay surf forecast from 31 Jul 2026:
- Best quality surf: Friday 7 Aug, 4AM (local time) - 6ft (1.8m), 19s period, S swell with offshore winds.
- Most powerful swell: Friday 7 Aug, 1PM (local time) - 6.5ft (2.0m), 18s period, S swell with 2,408 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 7AM (local time) - 3.5ft (1.1m), 15s period with S swell.
Best Forecast Surf Conditions for E-Bay this week:
The surf forecast for E-Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 03) at 7AM. The primary swell is predicted to be 1.1m and 15s period with a secondary swell of 0.1m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at E-Bay in the next 16 days are 2.0m 18s and forecast to arrive on Friday (Aug 07) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Wednesday (Aug 05) at 1PM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 3rd Aug) | 3.5ft (1.1m) 15s |
| Best Surf | 4AM (Fri 7th Aug) | 6ft (1.8m) 19s |
| Most Powerful | 1PM (Fri 7th Aug) | 6.5ft (2.0m) 18s |
Table - best surf conditions forecast for E-Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. The next couple of days are a bit of a write-off at E-Bay, but don’t walk away just yet. The real juice is waiting for us in the second week of August.
Right now, through the end of July and into the first weekend, the swell is small and onshore. We’re looking at knee-high, 3 ft, coming from the SSW with a solid 16 to 17-second period, but the wind is from the SE and SSE, blowing straight on. That’s a messy combo. The wave energy is moderate (577–665), but the conditions are marginal. Not worth paddling out for.
We hit a bit of a lull in the first few days of August. The swell stays around 3 ft to 4 ft, but the wind is cross-on or light cross. The wave energy is still moderate (485–792), but the quality is poor to marginal. Nothing to write home about.
Then things start to shift. By Monday the 4th of August, the wind swings offshore from the north, and we get a clean, glassy morning with 4 ft of S swell. The energy is moderate (745), but the conditions are good. Tuesday the 5th of August is the first real standout. The N wind is fresh at 12–15 mph, blowing offshore. The swell is 4 ft from the S with a 15-second period, and the wave energy is strong (826). Then on Tuesday afternoon, the period jumps to 20 seconds, and the energy surges to 1278. This is a proper groundswell. The waves are still only 3 ft, but the power is there, and it is clean. This is a solid session for the experienced crew.
Wednesday the 6th of August is even better. Offshore wind (N, 15 mph) and the swell lifts to 5 ft–6 ft from the S with a 16-second period. The energy is very strong (1444–1513). This is getting solid. Thursday the 7th of August sees the swell push to 6 ft–7 ft from the S, with a 17–18 second period. The wind is cross-off, and the energy is shot up to 2268–3669. This is big, powerful, and clean. For experts only. If you’re not comfortable in overhead, barreling waves, sit this one out. The reef at E-Bay will be working.
The 8th of August holds similar conditions: 6 ft–6 ft of S swell, offshore and cross-off winds, and very strong energy (1910–1934). Another top day for advanced surfers.
The 9th and 10th of August see the wind turn onshore, and the quality drops. The swell is still 5 ft–5 ft, but it gets chopped up. Not the pick.
Now, the big one. Tuesday the 11th of August. This is the standout of the entire forecast. The morning shows 10 ft of S swell with a 19-second period, and the energy is massive at 7036. The wind is cross-on from the SE, but the afternoon turns glassy. 10 ft of S swell, 18-second period, and the energy is still a massive 5221. This is a true, very long period groundswell hitting the reef. The waves will be powerful, thick, and straight. E-Bay is a reef, so it will handle this swell. This is exceptional for expert surfers only. Beginners, stay far, far away. The water temperature is 85°F, which is about normal for this time of year, so you won’t need a wetsuit.
After the 11th, the swell drops back to 7 ft–7 ft through the rest of the week, but the wind goes onshore from the SSE, and the quality is marginal. The energy is still strong (1349–3545), but the texture is messy. Not worth the drive unless you’re desperate for a paddle.
In short: ignore the first week. The best surf is August 5th through the 8th, and the absolute standout is the afternoon of August 11th at E-Bay. That’s a day for the memory books.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Fri night. Warm (max 29°C on Fri morning, min 27°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 97mm), heaviest during Wed night. Warm (max 28°C on Mon morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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) | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | S 19 | S 18 | S 16 | S 15 | S 14 | SSW 14 | S 16 | SSW 16 | SSW 15 | S 15 | SSW 20 | S 18 | S 17 | S 16 | S 16 |
Wave Graph | |||||||||||||||||||||
404 | 554 | 366 | 647 | 469 | 452 | 444 | 741 | 734 | 522 | 423 | 304 | 724 | 758 | 666 | 537 | 634 | 1454 | 1432 | 1452 | 1102 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | on | on | cross | glassy | off | off | cross-off | off | off | off | cross-off | off | off | cross-off |
High Tide | 7:53PM0.86m | 7:52AM1.15m | 8:23PM0.92m | 8:20AM1.11m | 8:53PM0.96m | 8:47AM1.05m | 9:26PM1.00m | 9:17AM0.97m | 10:03PM1.01m | 9:51AM0.87m | 10:49PM1.01m | 10:33AM0.76m | 11:48PM1.00m | ||||||||
Low Tide | 1:41PM0.08m | 1:21AM0.15m | 2:09PM0.06m | 2:00AM0.15m | 2:37PM0.05m | 2:39AM0.17m | 3:06PM0.05m | 3:22AM0.20m | 3:37PM0.07m | 4:09AM0.24m | 4:12PM0.10m | 5:04AM0.29m | 4:52PM0.14m | ||||||||
6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | 12 | 3 | — | 1 | 2 | 3 | 9 | 6 | 3 | 5 | 2 | 6 | 19 | 9 | 8 | 39 | 7 | 11 | 18 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 32 | 32 | 30 | 32 | 32 | 31 | 32 | 32 | 31 | 32 | 32 | 30 | 32 | 31 | 28 | 28 | 29 | 29 | 29 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | S 18 | S 16 | S 15 | S 14 | SSW 14 | S 16 | SSW 16 | SSW 15 | S 15 | S 15 | S 18 | S 17 | S 16 | S 16 |
404 | 554 | 366 | 647 | 469 | 452 | 348 | 741 | 734 | 522 | 423 | 304 | 724 | 758 | 666 | 537 | 459 | 1454 | 1432 | 1452 | 1102 | |
Swell 2 Height (m) Direction Period (s) | SSE 6 | WNW 10 | S 12 | WNW 10 | SSW 11 | S 20 | S 19 | SSW 14 | SW 8 | WNW 9 | SSE 7 | S 17 | N 6 | N 5 | SSE 6 | S 21 | SSW 20 | NNE 5 | S 5 | S 21 | S 20 |
37 | 20 | 69 | 18 | 11 | 125 | 444 | 80 | 3 | 8 | 68 | 287 | 21 | 13 | 13 | 229 | 634 | 8 | 12 | 36 | 604 | |
Swell 3 Height (m) Direction Period (s) | S 13 | — | SSW 20 | — | W 16 | WNW 11 | SSE 9 | WNW 10 | SW 8 | W 15 | S 18 | SSE 7 | S 6 | SSE 6 | N 5 | SSE 6 | N 6 | SW 15 | SSE 12 | S 6 | S 6 |
173 | — | 127 | — | 5 | 22 | 27 | 20 | 3 | 5 | 163 | 34 | 20 | 13 | 4 | 12 | 50 | 171 | 14 | 25 | 16 | |
Wind waves Height (m) Direction Period (s) | — | SSE 7 | SSE 5 | SSE 6 | SSE 7 | SSE 7 | SSE 8 | SSE 8 | SSE 8 | SSE 5 | — | — | — | — | — | N 6 | NNW 6 | SW 5 | — | — | — |
— | 41 | 44 | 78 | 83 | 99 | 91 | 95 | 91 | 53 | — | — | — | — | — | 60 | 135 | 30 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 0 |
Best forecast wave conditions in Mentawi Islands | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the E-Bay Surf forecast
The above surf forecast table for E-Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at E-Bay can be found by selecting the local surf guide option on the grey menu. Our E-Bay 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 (E-Bay) 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 E-Bay 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.
Are you planning a holiday in Mentawi Islands? If you are looking for accommodation near E-Bay, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Padang which is 168 km (104 miles) away.











