Surf Forecasts:
Nai Harn Beach surf forecast from 20 Jul 2026:
- Most powerful swell: Friday 24 Jul, 1PM (local time) - 4ft (1.2m), 6s period, W swell with 116 kJ wave energy.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The most powerful waves expected at Nai Harn Beach in the next 16 days are 1.2m 6s and forecast to arrive on Friday (Jul 24) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Monday (Jul 27) at 7AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Fri 24th Jul) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cooking for the next couple of weeks.
Honestly, mate, this is a tough one. Nai Harn Beach is looking pretty lackluster for the vast majority of the 16-day window. The water temp is sitting at 86°F, which is about normal for the time of year, so that’s fine, but the waves are just not cooperating. We’ve got a long stretch of poor surf conditions from the start right through to the end of July. The wind is mostly cross-onshore or stronger, with a cross-chop that’s wrecking any chance of a clean face. The swell is tiny, mostly 1ft to 2ft and short-period, which is just not enough to get excited about. There’s a bit of a bump in size on the 28th and 29th of July, with 5ft to 7ft swell from the west, but the wind is howling at 25 mph, strong cross-onshore, making it a messy, blown-out mess. The combined energy gets up to 483 (strong) on the morning of the 29th, but with that wind, it’s more of a kite-surfing setup than a paddling one.
Then there’s a proper gap of several days with no real recommendations. The next sniff of anything decent comes on the 1st of August. Saturday morning shows a tiny 1ft from the west-southwest, but the wind is a light cross-offshore from the east at 3 mph, and by the afternoon it goes glassy. The combined energy is weak (58) but the conditions are clean. It’s surfable, but only just, and very ordinary. That’s the only real standout, and it’s a long way off.
So, overall, the best on offer is the 1st of August. If you’re desperate for a paddle, wait for that Saturday. The swell is tiny, so it’s fine for beginners, but don’t expect anything thrilling. The rest of the period is a write-off.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed morning. Warm (max 29°C on Mon morning, min 28°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 39mm), heaviest during Thu night. Warm (max 28°C on Thu morning, min 26°C on Fri afternoon). Mainly fresh winds. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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) | W 7 | W 7 | W 8 | W 7 | WSW 7 | W 8 | W 8 | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 16 | W 17 | WSW 16 | WSW 15 | SW 15 | SW 14 | W 14 | W 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 8 | 32 | 27 | 11 | 46 | 28 | 70 | 57 | 66 | 109 | 112 | 112 | 5 | 6 | 24 | 23 | 8 | 8 | 4 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:20PM1.59m | 3:02AM1.52m | 2:59PM1.41m | 3:50AM1.45m | 3:48PM1.25m | 4:51AM1.39m | 5:03PM1.12m | 6:13AM1.37m | 6:53PM1.09m | 7:35AM1.42m | 8:19PM1.15m | 8:36AM1.52m | 9:13PM1.25m | ||||||||
Low Tide | 8:40PM0.34m | 9:05AM0.60m | 9:17PM0.48m | 10:03AM0.70m | 10:02PM0.60m | 11:26AM0.77m | 11:09PM0.69m | 1:10PM0.75m | 00:40AM0.72m | 2:28PM0.66m | 1:59AM0.67m | 3:18PM0.54m | 2:55AM0.58m | ||||||||
 | |  | | | |  | |  | | |  | | |  | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — |
mm | — | — | — | — | — | — | 1 | — | 2 | 3 | 3 | 12 | 5 | 1 | — | 7 | 2 | 6 | 4 | 4 | 7 |
Temp °C | 29 | 28 | 28 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 32 | 30 | 30 | 31 | 32 | 30 | 30 | 31 | 31 | 29 | 28 | 29 | 28 | 26 | 30 | 27 | 29 | 29 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 8 | W 7 | W 8 | W 8 | W 8 | W 7 | W 8 | W 18 | W 18 | W 18 | W 16 | W 16 | W 17 | WSW 16 | WSW 15 | SW 15 | SW 14 | W 14 | W 13 |
| kJ | 17 | 8 | 32 | 27 | 33 | 46 | 28 | 1 | 10 | 6 | 6 | 6 | 5 | 5 | 6 | 24 | 23 | 8 | 8 | 4 | 3 |
Swell 2 Height (m) Direction Period (s) | W 14 | W 13 | W 8 | WNW 8 | WSW 7 | W 8 | W 16 | W 16 | W 16 | W 15 | W 15 | W 14 | — | — | — | SW 16 | — | — | — | — | — |
| kJ | 4 | 3 | 1 | 13 | 11 | 1 | 5 | 5 | 5 | 4 | 4 | 4 | — | — | — | 10 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 9 | W 9 | W 13 | W 13 | W 13 | W 16 | W 12 | W 12 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 2 | 3 | 3 | 3 | 5 | 3 | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 7 | WNW 8 | WNW 3 | — | — | W 2 | W 5 | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 7 | WNW 7 | W 7 | WNW 7 | W 7 | W 6 | W 7 |
| kJ | 11 | 20 | 1 | — | — | 1 | 16 | 70 | 57 | 66 | 109 | 112 | 112 | 115 | 89 | 75 | 89 | 114 | 89 | 92 | 148 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 635 | 646 | 635 | 4 | 4 | 4 | 24 | 4 | 635 | 635 | 4 | 4 | 4 | 635 | 4 | 635 | 636 | 4 | 635 | 636 | 636 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nai Harn Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest