Surf Forecasts:
Nai Harn Beach surf forecast from 8 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 7AM (local time) - 8ft (2.4m), 8s period, W swell with 724 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 2.4m 8s and forecast to arrive on Sunday (Jul 12) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Wednesday (Jul 15) at 1AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Sun 12th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
G’day, Rusty here. Look, I’ll be straight with you – this is a tough run for Nai Harn Beach. The whole 16-day window is a write-off for decent surf. There’s absolutely nothing on offer that’s worth paddling out for, and that’s a long stretch of poor conditions.
From Wednesday afternoon, July 8th, right through to Thursday morning, July 23rd, it’s the same story. The swell is constantly coming from the west or west-southwest, which is cross-on or onshore, and the wind is just relentless—mostly a fresh breeze (19 to 22 mph), with a few days of strong breeze (25 mph) later on. That combo churns up the water, making it lumpy, choppy, and messy. You’re looking at swell heights between 4 ft and 8 ft, but the period is short, mostly 6 to 9 seconds, so it’s all weak, blown-out windswell with no real push. The combined energy ranges from moderate (115 to 200) early on, then jumps to strong (355 to 970) from July 11th onwards, but it doesn’t matter because the wind ruins it all. The water temp is sitting at 86°F with only a 1°F anomaly—pretty average for this time of year, so no surprises there.
Honestly, with the consistent cross-onshore winds and the beach-and-reef setup, this looks more like a stretch for kite surfing than paddle surfing. You’d be fighting the chop and the wind every session. Nai Harn Beach is inconsistent to begin with, so a blank run like this isn’t unusual for the area. The forecasts can change, but right now, there’s nothing to get excited about.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 29°C on Wed afternoon, min 28°C on Wed afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sun night. Warm (max 29°C on Sat afternoon, min 28°C on Sat afternoon). Winds decreasing (strong winds from the WSW on Sat night, light winds from the SW by Mon night). | ||||||||||||||||||||
Wed 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | W 7 | W 7 | W 6 | W 6 | W 18 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | WSW 8 | W 8 | W 8 | W 8 | W 8 | W 9 | W 9 | W 9 | W 18 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 179 | 131 | 119 | 100 | 6 | 173 | 158 | 173 | 355 | 371 | 491 | 695 | 481 | 542 | 513 | 409 | 371 | 371 | 389 | 6 | 389 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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-on | cross-on | on | cross-on | on | on | on | cross-on | cross-on |
High Tide | 4:58AM1.54m | 5:09PM1.34m | 6:14AM1.59m | 6:39PM1.31m | 7:28AM1.68m | 8:02PM1.36m | 8:34AM1.80m | 9:10PM1.46m | 9:30AM1.92m | 10:06PM1.56m | 10:19AM2.03m | 10:55PM1.65m | 11:05AM2.08m | ||||||||
Low Tide | 10:18PM0.40m | 11:17AM0.62m | 11:27PM0.45m | 12:46PM0.57m | 00:45AM0.46m | 2:06PM0.45m | 1:59AM0.41m | 3:10PM0.30m | 3:02AM0.33m | 4:04PM0.16m | 3:57AM0.25m | 4:51PM0.05m | 4:45AM0.20m | ||||||||
 |  |  |  | | | |  | | | | | | | | |  | | | | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 |
 | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | 6:47 |
mm | 1 | — | — | — | — | — | — | 1 | 1 | — | — | 1 | 1 | 5 | 3 | 3 | 3 | 5 | 1 | — | 2 |
Temp °C | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 29 |
Feels °C | 29 | 29 | 30 | 30 | 28 | 29 | 29 | 29 | 28 | 29 | 28 | 26 | 28 | 29 | 27 | 29 | 32 | 30 | 31 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | WSW 15 | SW 15 | W 14 | W 18 | SW 16 | WSW 16 | — | — | — | — | W 8 | W 13 | W 8 | W 8 | W 9 | W 9 | W 9 | W 9 | W 9 |
| kJ | 21 | 21 | 21 | 8 | 4 | 6 | 11 | 25 | — | — | — | — | 481 | 3 | 513 | 409 | 371 | 371 | 389 | 461 | 389 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 19 | W 18 | W 14 | W 13 | W 13 | — | — | — | — | WSW 13 | W 16 | W 12 | W 12 | W 20 | W 20 | SSE 5 | SSE 5 | SSE 5 |
| kJ | — | — | — | 7 | 6 | 4 | 3 | 3 | — | — | — | — | 17 | 5 | 3 | 3 | 8 | 8 | 2 | 2 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | W 14 | W 19 | W 18 | W 17 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | 4 | 7 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | W 7 | W 7 | W 6 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | WSW 8 | WSW 8 | W 8 | S 4 | S 4 | SSE 4 | SSE 4 | — | — | — |
| kJ | 179 | 131 | 119 | 100 | 124 | 173 | 158 | 173 | 355 | 371 | 491 | 695 | 207 | 542 | 1 | 1 | 1 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 635 | 635 | 4 | 636 | 635 | 635 | 24 | 635 | 24 | 601 | 636 | 635 | 601 | 24 | 82 | 24 | 4 | 4 | 4 | 4 | 24 |
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.
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