Surf Forecasts:
Is Arenas surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 2PM (local time) - 3.5ft (1.0m), 6s period, NW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 2PM (local time) - 3.5ft (1.0m), 6s period, NW swell with 72 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2PM (local time) - 3.5ft (1.0m), 6s period with NW swell.
Best Forecast Surf Conditions for Is Arenas this week:
The surf forecast for Is Arenas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 2PM. The primary swell is predicted to be 1.0m and 6s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Is Arenas in the next 16 days are 1.0m 6s and forecast to arrive on Tuesday (Aug 18) at 2PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Tue 18th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 2PM (Tue 18th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 2PM (Tue 18th Aug) | 3.5ft (1.0m) 6s |
Table - best surf conditions forecast for Is Arenas over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s have a look at what’s on the menu for Is Arenas over the next couple of weeks. I gotta be straight with you—this stretch is looking like a long, quiet one, so don’t get your hopes up too early.
We’re starting off with a real dud. From Tuesday 11 August all the way through to Monday 18 August, there’s basically nothing worth paddling out for. The water’s warm—83°F—which is a solid 5°F warmer than usual for this time of year, so that’s a nice bonus if you’re just floating around, but the surf itself is a total ghost town. Tiny scraps of swell, mostly under 1ft, with periods so short they’re barely a ripple. You’ll see a few clean mornings with glassy conditions, but with no energy behind it, you’re just polishing your board.
That gap runs nearly a full week before we finally see a pulse. On Tuesday 18 August, the afternoon shows a little life: 3ft from the NW with a 6-second period. The combined energy is still weak at 72, and the conditions are “ordinary,” but it’s surfable. Hey, it’s a start.
Now, the one true standout in this whole outlook lands on Wednesday 19 August. The morning session is where it’s at. We’ve got a clean 7ft NW swell, 8-second period, and the combined energy jumps to 582 (moderate wave energy). The wind is glassy—absolutely calm—from the NNE. That’s going to give you some clean, lined-up waves at Is Arenas. The sandbar setup works best with that NW swell direction, and the glassy conditions mean the face will be smooth. Keep in mind, this is a sandbar break that’s *inconsistent* and can get crowded *sometimes*. At 7ft, this is tipping into expert territory for most; it’s going to be a bit too much for beginners. The afternoon on the same day gets messy with a cross-shore wind, so don’t sleep in—hit the water early.
After that pulse, things drop off again. Thursday 20 August through the rest of the window shows nothing but knee-high dribble, onshore winds, and flat spells. The combined energy drops back to single digits or zero. There’s no second wave of note.
So, bottom line: the whole 16-day window is a long stretch of flat, with one shining moment on Wednesday 19 August morning. That’s your window. If you’re a confident surfer, make that call. Otherwise, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 33°C on Tue afternoon, min 26°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 32°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | — | — | NNW 4 | NNW 3 | NW 4 | NW 4 | NW 4 | NW 4 | NNW 4 | NNW 3 | NNW 3 | NNW 3 | — | — | NNW 3 | NW 4 | WNW 5 | NW 4 | — | NW 3 | NW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 3 | 1 | 1 | 3 | 2 | 3 | 6 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 3 | 4 | 0 | 2 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | on | off | glassy | on | glassy | cross-off | on | cross-off | cross-off | on | cross-off | glassy | cross-on | off |
High Tide | 8:22AM0.19m | 9:30PM0.30m | 9:10AM0.19m | 10:10PM0.31m | 9:55AM0.20m | 10:48PM0.31m | 10:37AM0.20m | 11:23PM0.30m | 11:19AM0.20m | 11:56PM0.28m | 12:02PM0.20m | 00:27AM0.26m | 12:47PM0.19m | 00:57AM0.23m | |||||||
Low Tide | 2:32PM0.00m | 3:56AM0.07m | 3:15PM-0.01m | 4:36AM0.06m | 3:56PM-0.01m | 5:14AM0.05m | 4:36PM0.00m | 5:50AM0.05m | 5:15PM0.02m | 6:24AM0.05m | 5:54PM0.04m | 6:56AM0.06m | 6:35PM0.07m | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — |
 | — | 8:29 | — | — | 8:27 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 32 | 33 | 30 | 32 | 33 | 31 | 31 | 31 | 30 | 31 | 30 | 28 | 31 | 31 | 28 | 31 | 32 | 30 | 30 | 30 | 28 |
Feels °C | 32 | 32 | 31 | 32 | 32 | 32 | 31 | 30 | 33 | 32 | 30 | 31 | 31 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | — | — | NNW 4 | NNW 3 | NW 4 | NW 4 | NW 4 | — | NNW 4 | NNW 3 | — | NNW 3 | — | — | NNW 3 | NW 4 | NW 5 | NW 4 | — | — | — |
| kJ | — | — | 3 | 1 | 1 | 3 | 2 | — | 6 | 1 | — | 1 | — | — | 1 | 1 | 1 | 4 | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | — | — | NW 4 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 3 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 4 | — | — | NNW 3 | — | — | — | — | — | WNW 5 | — | — | NW 3 | NW 4 |
| kJ | — | — | — | — | — | — | — | 3 | — | — | 1 | — | — | — | — | — | 3 | — | — | 2 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 913 | 1104 | 930 | 912 | 1339 | 940 | 940 | 1081 | 930 | 1021 | 1262 | 915 | 991 | 1065 | 900 | 900 | 1103 | 953 | 279 | 930 | 279 |
Best forecast wave conditions in Sardinia | |||||||||||||||||||||
Best forecast wave conditions in Italy | |||||||||||||||||||||
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Information about the Is Arenas Surf forecast
The above surf forecast table for Is Arenas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Is Arenas can be found by selecting the local surf guide option on the grey menu. Our Is Arenas 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 (Is Arenas) 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 Is Arenas 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 Sardinia? If you are looking for accommodation near Is Arenas, camping, hotels and holiday cottages in Sardinia, consider staying in Oristano which is 21 km (13 miles) away. Other places in and around Sardinia where you can find information about places to rent, and car hire include Alghero which is 56 km (35 miles) away, Sassari, Nuoro and Iglesias.
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