
Surf Forecasts:
Gilligans surf forecast from 18 Jul 2026:
- Best quality surf: Sunday 19 Jul, 7PM (local time) - 3.5ft (1.1m), 17s period, SSW swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 7AM (local time) - 6ft (1.9m), 17s period, SSW swell with 2,189 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 7PM (local time) - 4ft (1.2m), 14s 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 Saturday (Jul 18) at 7PM. The primary swell is predicted to be 1.2m and 14s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Gilligans in the next 16 days are 1.9m 17s and forecast to arrive on Monday (Jul 20) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Sat 18th Jul) | 4ft (1.2m) 14s |
| Best Surf | 7PM (Sun 19th Jul) | 3.5ft (1.1m) 17s |
| Most Powerful | 7AM (Mon 20th Jul) | 6ft (1.9m) 17s |
Table - best surf conditions forecast for Gilligans over the next 16 days.
The Lowdown
G'day, Rusty here, lookin' at the charts for the next 16 days, and honestly, I'm gettin' a bit of a tingle. This is a real good run for Gilligans. It's a reef setup, exposed to the swell, and it's very consistent. We're in for a treat.
The water's sittin' at 86°, which is a touch warmer than average for this time of year, but nothin' too wild.
The surf kicks off Saturday, 18 July, and it's a beautiful start. Saturday morning, we've got a clean 4 ft SW swell, with a 14-second period pushin' some proper energy (766). The wind is a light cross-off from the ESE at 6 mph, makin' for clean lines. Saturday afternoon goes glassy with a 3 mph ESE breeze, droppin' to 4 ft but still plenty of punch. This is a solid opener.
Sunday, 19 July, keeps the good times rollin'. Morning glass-off with a 3 mph westerly, and a 4 ft SSW swell. The afternoon goes dead calm, with a 3 ft SSW groundswell and a period of 18 seconds – that's some serious long-period energy (997). It'll be beautiful, but that long period can make beach breaks a bit too straight. On a reef like Gilligans, this is a dream.
Now, Monday, 20 July, is where we really get goin'. The morning shows a 6 ft SSW swell, 17-second period, and the energy jumps to 2178. The wind is a light cross-off from the east at 3 mph. The afternoon is glassy, with the same size swell. This is a standout – clean, powerful, and for the more experienced. It's a touch over 5 ft, so it's not for the groms, but for anyone with a bit of skill, this is the best of the first week.
Tuesday, 21 July, still holds strong. Morning has a 5 ft SSW swell, 14-second period, with a cross-off ESE breeze at 9 mph. The afternoon gets a bit of a cross-chop from the SE at 9 mph, but the swell is still a solid 5 ft.
The rest of the week from Wednesday, 22 July, through to the end of the month gets a bit more average. The swell drops and the winds turn more cross-shore, with a bit of chop. It's not terrible, but it's nothin' to write home about. The energy stays moderate (mostly in the 500-800 range), and the conditions are marginal.
Then, we get a proper long-range call for Friday, 31 July. This is the one. Friday morning shows a 8 ft SW swell, 18-second period, and the energy is a massive 4370. The wind is a clean cross-off from the SE at 9 mph. Friday afternoon gets even better – 8 ft SW swell, 18-second period, and energy at 4788, with the same clean cross-off. This is for experts only. It's big, powerful, and perfect. It's a week and a half out, so keep an eye on it, but it's lookin' like the best wave of the whole forecast.
The weekend of 1-2 August drops off again with the swell hangin' around 7-8 ft, but the winds turn more cross-shore, and the surface gets a bit messy. Still there for the takers, but not as clean as that Friday.
So, if you're plannin' a session, lock in the 20th for a great day, and keep your fingers crossed for the 31st. That one could be a proper session.
Rusty.
Short Range ForecastHeavy rain (total 39mm), heaviest during Sun morning. Warm (max 28°C on Sat morning, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 59mm), heaviest during Wed afternoon. Warm (max 28°C on Thu morning, min 26°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 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) | SW 14 | SW 14 | SW 13 | SSW 13 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
Wave Graph | |||||||||||||||||||||
667 | 573 | 525 | 458 | 547 | 1811 | 2040 | 1849 | 1531 | 1061 | 917 | 595 | 390 | 312 | 307 | 512 | 591 | 618 | 671 | 579 | 477 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | glassy | glassy | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 9:23PM0.84m | 9:22AM0.94m | 10:08PM0.85m | 10:01AM0.82m | 10:55PM0.85m | 10:39AM0.69m | 11:45PM0.83m | 11:22AM0.58m | 00:41AM0.80m | 12:18PM0.49m | 1:46AM0.79m | 1:47PM0.42m | 2:54AM0.79m | ||||||||
Low Tide | 3:12PM0.03m | 3:07AM0.17m | 3:43PM0.07m | 3:59AM0.24m | 4:14PM0.11m | 4:54AM0.31m | 4:44PM0.15m | 5:59AM0.35m | 5:16PM0.20m | 7:29AM0.37m | 5:57PM0.23m | 9:27AM0.35m | 6:53PM0.26m | ||||||||
6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | |
mm | 3 | — | 7 | 7 | 5 | 1 | 5 | 5 | 6 | 4 | 4 | 12 | 9 | 11 | 16 | 1 | 2 | — | — | 1 | 15 |
Temp °C | 28 | 27 | 27 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 27 |
Feels °C | 32 | 32 | 32 | 31 | 32 | 29 | 31 | 32 | 30 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 27 | 27 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 14 | SSW 13 | SW 15 | SW 15 | SW 15 |
667 | 573 | 525 | 458 | 388 | 1811 | 2040 | 1849 | 1531 | 1061 | 917 | 595 | 390 | 312 | 169 | 60 | 107 | 69 | 55 | 149 | 149 | |
Swell 2 Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSW 18 | WSW 6 | WNW 7 | WNW 8 | SSE 7 | WNW 7 | WNW 11 | SSW 18 | WNW 10 | SSE 9 | WNW 11 | SSW 15 | SW 16 | SW 16 | WNW 10 | SSW 18 | S 16 |
82 | 86 | 69 | 65 | 547 | 54 | 18 | 13 | 59 | 11 | 23 | 62 | 18 | 26 | 39 | 85 | 41 | 90 | 20 | 103 | 135 | |
Swell 3 Height (m) Direction Period (s) | NW 8 | WNW 8 | WNW 8 | SSW 17 | SSE 7 | SSE 7 | — | — | WNW 8 | WNW 11 | SSW 19 | WNW 8 | SSW 16 | SSW 16 | SW 17 | WNW 10 | WNW 10 | WNW 11 | S 18 | WNW 10 | WNW 10 |
17 | 13 | 12 | 99 | 62 | 61 | — | — | 12 | 11 | 37 | 6 | 51 | 86 | 77 | 20 | 21 | 22 | 57 | 10 | 9 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SSE 7 | SSE 8 | SSE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
— | — | — | — | — | 134 | 120 | 117 | 111 | 88 | 121 | 108 | 143 | 121 | 307 | 512 | 591 | 618 | 671 | 579 | 477 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 9 | 33 | 138 | 33 | 520 | 138 | 473 | 138 | 138 |
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.










