Surf Forecasts:
Gilligans surf forecast from 29 Aug 2026:
- Best quality surf: Thursday 3 Sep, 1AM (local time) - 5ft (1.6m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 7AM (local time) - 8ft (2.5m), 17s period, SSW swell with 3,744 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 1AM (local time) - 5ft (1.6m), 16s period with SW swell.
Best Forecast Surf Conditions for Gilligans this week:
The surf forecast for Gilligans over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 03) at 1AM. The primary swell is predicted to be 1.6m and 16s period with a secondary swell of 0.9m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Gilligans in the next 16 days are 2.5m 17s and forecast to arrive on Tuesday (Sep 01) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 3rd Sep) | 5ft (1.6m) 16s |
| Best Surf | 1AM (Thu 3rd Sep) | 5ft (1.6m) 16s |
| Most Powerful | 7AM (Tue 1st Sep) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Gilligans over the next 16 days.
The Lowdown
Alright, Rusty here, and I’m looking at the charts for the next couple of weeks. There’s a long stretch ahead, so let’s get into it.
Gilligans (reef) – The only spot on the menu for this whole run. The water temp is sitting right around 85°, which is about normal for this time of year, so no surprises there.
The first real action doesn’t show up until Saturday morning, August 29th. We’ve got a 5 ft SSW swell rolling in with a 14-second period, but the energy is only moderate at 942. The wind is a cross-shore from the SE at 16 mph, which is going to put a bit of a chop on the surface. It’s surfable, but it’s not going to be pretty. The afternoon looks worse as the wind swings more onshore and choppy, so that morning window is your best bet for the weekend.
Sunday, August 30th, offers a bit more juice. The swell height drops to 4 ft, but the period jumps to a very long 20 seconds from the SW, and the combined energy is strong at 1710. The wind is lighter, a gentle cross-shore breeze, so the morning should have some clean lines despite the smaller size. This is a long-period groundswell, meaning it’ll wrap into the reef nicely, but be aware of longer waits between sets.
Moving into Monday, August 31st, the swell builds to 6 ft and then 7 ft by the afternoon, with a solid 18-second period and strong energy reading over 2600. Still, the cross-shore wind keeps it from being glassy. The pulse holds through Tuesday, September 1st, with 8 ft swell and energy up over 3000. That’s expert territory – too big for beginners. The wind is still cross-shore, so expect some chop, but the power is there.
The middle of the week, from Wednesday, September 2nd, through to the following weekend, is a bit of a grind. The swell drops back to 4 ft to 5 ft, periods shorten, and the wind is mostly cross-shore. There’s a lot of “risk tstorm” in the forecast, which adds to the uncertainty. The surf is marginal, and the conditions are not setting up for anything special.
Then we get a glimmer of hope. On Wednesday morning, September 9th, the forecast shows a 5 ft SSW swell with a 17-second period, and the wind turns cross-offshore from the ESE at only 6 mph. That’s clean. The energy is strong at 1655. This is the standout of the whole outlook. The swell direction is SW, which is the optimum for this spot, and the light offshore wind will have the reef lining up nice. It’s still a long-period swell, so it’ll have some power, but it’s not too big for a confident intermediate.
Thursday, September 10th, follows with a similar setup – 5 ft to 6 ft, clean cross-offshore winds in the morning, and strong energy. This two-day window is where you want to be.
The final weekend, from September 11th to 13th, sees the swell spike again, hitting 8 ft on Friday morning with energy over 4800, but the wind is back to cross-shore and messy. By Sunday, the 13th, the wind swings cross-offshore again, but the swell has dropped to 5 ft. It’s a decent end to the run, but the earlier mid-week window is the clear winner.
So, to wrap it up: The first week is a mixed bag with some fun but not great conditions. The real standout is the 9th and 10th of September – clean, solid swell, and the right wind. Mark your calendar for that.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 29°C on Sun afternoon, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 47mm), heaviest during Wed night. Warm (max 29°C on Tue afternoon, min 26°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 14 | SSW 13 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 13 |
Wave Graph | ||||||||||||||||||||
607 | 545 | 908 | 973 | 1321 | 1974 | 2660 | 3123 | 3038 | 2742 | 2357 | 1829 | 1571 | 1284 | 928 | 915 | 731 | 581 | 451 | 447 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross-off | cross | cross | cross | cross | cross-on | cross |
High Tide | 7:11PM0.87m | 7:12AM0.97m | 7:40PM0.93m | 7:43AM0.92m | 8:12PM0.97m | 8:14AM0.85m | 8:46PM0.99m | 8:47AM0.77m | 9:25PM0.98m | 9:24AM0.67m | 10:11PM0.94m | 10:08AM0.56m | 11:11PM0.90m | |||||||
Low Tide | 1:01AM0.11m | 1:26PM0.02m | 1:39AM0.10m | 1:51PM0.02m | 2:18AM0.11m | 2:17PM0.02m | 2:59AM0.13m | 2:46PM0.04m | 3:46AM0.17m | 3:18PM0.08m | 4:44AM0.23m | 3:56PM0.13m | ||||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:20 | — | |
mm | — | — | — | 1 | — | 1 | — | — | 1 | — | 5 | 4 | 2 | 12 | 7 | 4 | 7 | 6 | 3 | 14 |
Temp °C | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 28 | 28 | 29 | 27 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 28 | 29 | 31 | 29 | 30 | 29 | 30 | 29 | 31 | 30 | 30 | 31 | 31 | 31 | 31 | 29 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | S 13 | SSW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 13 |
607 | 545 | 473 | 973 | 1321 | 1974 | 2660 | 3123 | 3038 | 2742 | 2357 | 1829 | 1571 | 1284 | 928 | 915 | 731 | 581 | 451 | 447 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 21 | SW 20 | S 13 | S 9 | SW 12 | WNW 10 | S 11 | — | W 18 | W 18 | W 17 | W 16 | SSE 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SSW 16 | SSW 16 |
51 | 302 | 908 | 477 | 127 | 95 | 9 | 21 | — | 56 | 54 | 50 | 47 | 101 | 6 | 7 | 6 | 6 | 87 | 253 | |
Swell 3 Height (m) Direction Period (s) | SSW 23 | WNW 9 | SW 13 | SW 12 | SW 12 | WNW 10 | W 19 | — | — | — | — | — | — | WNW 8 | W 16 | W 16 | W 15 | W 14 | WNW 7 | SSW 19 |
52 | 8 | 205 | 184 | 120 | 9 | 7 | — | — | — | — | — | — | 6 | 20 | 19 | 5 | 4 | 5 | 37 | |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | — | — | S 12 | S 11 | SSE 9 | S 9 | S 9 | SSE 8 | SSE 8 | SSE 8 | — | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 7 | SSE 5 |
121 | 82 | 124 | — | — | 327 | 281 | 135 | 154 | 151 | 112 | 144 | 137 | — | 110 | 104 | 81 | 81 | 62 | 25 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 520 | 138 | 33 | 33 | 5 | 138 | 33 | 21 | 138 | 33 | 21 | 5 | 33 | 0 | 5 | 33 | 33 | 97 | 33 | 97 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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Information about the Gilligans Surf forecast
The above surf forecast table for Gilligans provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Gilligans can be found by selecting the local surf guide option on the grey menu. Our Gilligans 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 (Gilligans) 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 Gilligans 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 Gilligans, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Sungaipenuh which is 173 km (107 miles) away.











