
Surf Forecasts:
Nai Harn Beach surf forecast from 31 Jul 2026:
- Best quality surf: Sunday 2 Aug, 1AM (local time) - 1ft (0.3m), 16s period, WSW swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 10PM (local time) - 8ft (2.4m), 8s period, W swell with 817 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 1AM (local time) - 1ft (0.3m), 16s period with WSW swell.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The surf forecast for Nai Harn Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 02) at 1AM. The primary swell is predicted to be 0.3m and 16s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Nai Harn Beach in the next 16 days are 2.4m 8s and forecast to arrive on Friday (Aug 07) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Saturday (Aug 01) at 4AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 2nd Aug) | 1ft (0.3m) 16s |
| Best Surf | 1AM (Sun 2nd Aug) | 1ft (0.3m) 16s |
| Most Powerful | 10PM (Fri 7th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
The Lowdown
Alright, Rusty here, and I've gotta be straight with you – the next couple of weeks are looking pretty grim for a proper paddle out at Nai Harn Beach. The forecast is a long, frustrating run of onshore winds and messy conditions that just aren't giving us a window for decent surf.
We start off this Saturday morning, August 1st, with a tiny 0.7ft swell from the WSW, but the real kicker is that long 16-second period. While that usually means good energy, it's just too small to do anything with. The wind is glassy though, which is a tease. That glassy window is gone by the afternoon as the wind swings cross-onshore.
Sunday morning, August 2nd, is the closest we get to anything remotely surfable for a while. We've got a 2ft swell from the west, a clean 8-second period, and glassy conditions. The combined energy is a weak 53, so it's not going to be a world-beater, but for a beginner or someone just wanting to get wet on a foamie, it's a possibility. The W direction isn't its optimum, but with the wind being glass, it's the only real chance you'll have. After that, it's a long, dusty road.
From Monday, August 3rd, all the way through to Sunday, August 16th, it's a nightmare. The wind is locked in from the WSW or SW, blowing hard – onshore straight into the beach. The swell builds, but it's totally blown out. We see the combined energy climb into the hundreds (289, 310, 354), and even hit four digits on the 9th of August (1021), which is strong wave energy. But the wave comment is "poor surf conditions" all the way through. The swell gets up to 8ft, but with that strong onshore wind, it's just a washing machine. For the experienced crew, even that overhead swell is going to be a sloppy, lumpy mess with the wind. If you're a kiter, maybe this setup is more interesting than for a paddle surfer, especially from the 4th of August onwards when the wind is up.
We get a weird little blip on Wednesday, August 12th, where the swell drops to 0.3ft with a 20-second period, but the wind is still a strong 25 mph, so it's not even worth mentioning as a surf option. The whole run is a write-off. The water temperature is about average for this time of year, so no wetsuit needed, but you'll be fighting the wind all day.
Honestly, the only day I'd even consider paddling out is Sunday morning, August 2nd, and that's only if you're desperate for a dribbly glassy session. The rest of the window is a bust. Hang in there, the forecasts can change, but for now, it's a waiting game.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Warm (max 29°C on Fri night, min 28°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 42mm), heaviest during Tue night. Warm (max 29°C on Wed afternoon, min 28°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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) | WSW 16 | WSW 16 | WSW 16 | W 8 | W 8 | W 8 | WSW 15 | W 9 | W 9 | W 8 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 8 | W 8 | W 8 | W 8 | W 8 | W 9 |
Wave Graph | |||||||||||||||||||||
26 | 25 | 51 | 28 | 31 | 24 | 23 | 15 | 55 | 283 | 304 | 318 | 322 | 386 | 627 | 671 | 522 | 558 | 464 | 603 | 769 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | glassy | on | on | on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | on | on | on | on | on | on |
High Tide | 12:02PM1.95m | 00:29AM1.73m | 12:32PM1.91m | 1:01AM1.75m | 1:04PM1.83m | 1:37AM1.74m | 1:39PM1.71m | 2:16AM1.69m | 2:20PM1.57m | 3:05AM1.62m | 3:12PM1.40m | 4:10AM1.54m | 4:30PM1.24m | ||||||||
Low Tide | 5:51AM0.23m | 6:23PM0.07m | 6:24AM0.23m | 6:52PM0.07m | 6:59AM0.27m | 7:22PM0.11m | 7:37AM0.34m | 7:56PM0.19m | 8:22AM0.44m | 8:36PM0.30m | 9:18AM0.55m | 9:27PM0.44m | 10:40AM0.65m | 10:43PM0.57m | |||||||
6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | |
mm | 1 | — | — | 1 | — | — | — | — | 7 | 1 | 2 | 7 | 7 | 1 | 5 | 8 | 4 | 7 | 2 | 2 | 4 |
Temp °C | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 32 | 32 | 33 | 32 | 32 | 32 | 32 | 32 | 30 | 29 | 29 | 29 | 28 | 29 | 30 | 26 | 27 | 26 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | W 9 | W 8 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | — | — | W 16 | — | SW 16 | — | — |
66 | 49 | 33 | 28 | 31 | 18 | 17 | 9 | 55 | 283 | 304 | 318 | 322 | 386 | — | — | 5 | — | 10 | — | — | |
Swell 2 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 16 | WSW 15 | W 9 | WSW 11 | SSE 4 | SE 4 | S 5 | S 5 | W 16 | — | — | W 19 | — | — | — | — |
26 | 25 | 51 | 24 | 23 | 24 | 23 | 15 | 43 | 2 | 1 | 21 | 7 | 21 | — | — | 7 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | S 4 | NW 5 | W 8 | — | — | S 4 | SSE 5 | S 4 | W 18 | W 17 | W 17 | WSW 16 | SW 16 | — | — | — | — | — | — | — |
— | 1 | 1 | 1 | — | — | 2 | 2 | 2 | 6 | 6 | 5 | 25 | 10 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 10 | WSW 10 | WSW 8 | W 8 | W 8 | W 8 | W 8 | W 9 |
— | — | — | — | — | — | — | — | — | — | — | — | — | 163 | 627 | 671 | 522 | 558 | 464 | 603 | 769 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 0 | 0 | 4 | 4 | 4 | 782 | 4 | 24 | 24 | 4 | 797 | 1073 | 24 | 797 | 641 | 744 | 797 | 688 | 748 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
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Information about the Nai Harn Beach Surf forecast
The above surf forecast table for Nai Harn Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nai Harn Beach can be found by selecting the local surf guide option on the grey menu. Our Nai Harn Beach 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 (Nai Harn Beach) 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 Nai Harn Beach 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.
Nai Harn Beach is 8 km (5 miles) from the city of Ban Chalong. If you plan a holiday in Phuket, look for hotels and other accommodation in Ban Chalong. Ban Chalong has rooms for a wide range of budgets as well as car hire and transport links.











