Surf Forecasts:
E-Bay surf forecast from 18 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 7ft (2.2m), 17s period, S swell with 2,968 kJ wave energy.
Best Forecast Surf Conditions for E-Bay this week:
The most powerful waves expected at E-Bay in the next 16 days are 2.2m 17s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Monday (Aug 24) at 10PM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Wed 19th Aug) | 7ft (2.2m) 17s |
Table - best surf conditions forecast for E-Bay over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’m looking at the next couple of weeks for E-Bay.
Overall, it’s a frustrating outlook. There’s plenty of swell on the cards, especially in the first week, but the quality looks poor for paddle surfing almost the entire time. We’re looking at a stretch of onshore winds that are going to mess things up, making for choppy, lumpy conditions. The first real window of interest is the middle of next week, but it comes with caveats.
The Build-Up and the Problems:
It kicks off on Tuesday the 18th with some solid groundswell – 5ft of SSW swell with a very long 16-second period, and combined wave energy is strong at 1319. The problem? A moderate onshore SSE breeze at 12 mph. That’s going to put a lot of bump on the surface. The water’s warm, 85°, which is pretty normal for the time of year. The swell builds through Wednesday the 19th, pushing close to 7ft from the S, with energy readings going through the roof (3029 by Wednesday afternoon). But again, we’re stuck with onshore winds, sometimes from the SSE, sometimes S. It’s going to be big and powerful but messy. This swell is very long-period (over 16 seconds), which really needs a point or reef to wrap into shape – and while E-Bay is a reef, the onshore wind is just going to flatten it or make it a wash.
Thursday the 20th and Friday the 21st see the swell start to dip a bit, but the onshore wind sticks around. By Friday, we actually get a “cross-on” wind from the SE, which is a slight improvement, but the report says “gentle cross-onshore and fairly choppy,” so it’s not the clean surf we’re after.
The Potential Standout (with a big “if”):
Now, here’s where it gets interesting. Wednesday the 27th of August into Thursday the 28th looks like a promising little window. The swell on the 27th afternoon builds back to 3ft from the SSW with a sweet long period of 17 seconds. The wind prediction is light, onshore from the SSE at 9 mph. That’s not perfect, but it’s the cleanest offering in the entire forecast. If that wind lays down or goes lighter, E-Bay’s reef setup could really work with that long-period groundswell. The combined energy is moderate (1070), so there’s some grunt. This is the best bet for a session, but it’s marginal, so keep your expectations in check.
The Long-Range Haze:
The second week slides off into smaller, weaker, and stormier-looking conditions. There’s a tease on the 29th and 30th with little 2ft to 3ft swells, but the wind is often cross-on or straight on. The energy drops way off into the hundreds. Confidence is low for this period.
Bottom Line:
Honestly, for a straight paddle surf, the pickings are slim. The consistent onshore wind is the villain here. If you’re more into kite surfing, those bigger, wind-affected days from the 18th to the 23rd might actually look fun. You’d be flying. For laying on a board and paddling, maybe keep an eye on the 27th, and be ready for a gamble. It’s not a classic run for E-Bay.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Tue night. Warm (max 28°C on Tue morning, min 27°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Warm (max 28°C on Fri morning, min 27°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 16 | SSW 19 | SSW 19 | SSW 18 | S 17 | S 16 | S 16 | SSW 16 | SSW 15 | S 15 | S 18 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 14 | S 16 | S 16 | S 15 |
Wave Graph | |||||||||||||||||||||
1132 | 980 | 2470 | 2640 | 2968 | 2440 | 2114 | 1685 | 1418 | 1060 | 891 | 1667 | 1551 | 1377 | 1045 | 840 | 700 | 649 | 513 | 1301 | 522 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | cross-on | on | on | on | cross-on | on | on | on | on | cross-on | on | on | on | on | on | on |
High Tide | 10:15PM1.03m | 10:06AM0.76m | 10:58PM0.96m | 10:35AM0.64m | 11:52PM0.88m | 11:12AM0.54m | 1:11AM0.83m | 1:42PM0.47m | 2:40AM0.84m | 3:35PM0.50m | 3:50AM0.89m | 4:38PM0.57m | |||||||||
Low Tide | 3:26PM0.10m | 4:10AM0.27m | 3:55PM0.15m | 4:56AM0.34m | 4:28PM0.21m | 5:55AM0.41m | 5:08PM0.27m | 7:39AM0.44m | 6:07PM0.33m | 11:09AM0.38m | 7:37PM0.37m | 11:22AM0.31m | 9:14PM0.35m | ||||||||
6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | |
— | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:27 | — | — | 6:27 | — | — | 6:27 | — | |
mm | 1 | — | 7 | 3 | — | 2 | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — | — | — | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 31 | 30 | 30 | 29 | 29 | 29 | 28 | 29 | 28 | 30 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | S 15 | SSW 19 | SSW 18 | S 17 | S 16 | S 16 | SSW 16 | SSW 15 | S 15 | S 14 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 14 | S 16 | S 16 | S 15 |
1132 | 791 | 2470 | 2640 | 2968 | 2440 | 2114 | 1685 | 1418 | 1060 | 703 | 1667 | 1551 | 1377 | 1045 | 840 | 700 | 649 | 513 | 1301 | 522 | |
Swell 2 Height (m) Direction Period (s) | SSW 21 | SSW 19 | W 8 | — | WNW 10 | WNW 10 | WNW 10 | WNW 11 | S 22 | S 19 | S 18 | WNW 10 | WNW 9 | S 24 | S 18 | S 20 | S 19 | S 18 | SSW 20 | SSW 19 | SSW 18 |
180 | 980 | 5 | — | 10 | 20 | 20 | 22 | 37 | 472 | 891 | 19 | 17 | 11 | 99 | 268 | 598 | 613 | 131 | 197 | 318 | |
Swell 3 Height (m) Direction Period (s) | WNW 8 | W 22 | W 10 | — | — | — | — | — | SSW 22 | WSW 7 | WNW 11 | W 16 | W 16 | SW 24 | SSW 22 | WNW 9 | S 16 | SSW 22 | SSW 20 | W 10 | WNW 8 |
7 | 9 | 2 | — | — | — | — | — | 91 | 17 | 22 | 5 | 5 | 22 | 98 | 8 | 45 | 45 | 218 | 2 | 6 | |
Wind waves Height (m) Direction Period (s) | SSE 10 | SSE 6 | S 5 | SSE 5 | SW 10 | SW 10 | SW 10 | — | — | SSE 4 | SW 7 | — | — | SSE 4 | — | SSE 5 | — | — | S 13 | S 13 | SSE 8 |
98 | 17 | 25 | 22 | 51 | 27 | 36 | — | — | 9 | 12 | — | — | 22 | — | 33 | — | — | 488 | 546 | 81 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 378 | 113 | 154 | 0 | 6 | 6 | 0 | 0 | 0 | 0 | 2 | 154 | 6 | 378 | 142 | 6 | 478 | 6 | 113 | 310 | 478 |
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.











