Surf Forecasts:
Nai Harn Beach surf forecast from 24 Jul 2026:
- Most powerful swell: Wednesday 29 Jul, 7AM (local time) - 7.5ft (2.3m), 8s period, W swell with 620 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 2.3m 8s and forecast to arrive on Wednesday (Jul 29) 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 2.0m 8s period and expected on Tuesday (Jul 28) at 10PM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Wed 29th Jul) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
The Lowdown
Right, grab a coffee, this is a tough one to write. I'm lookin' at the Nai Harn Beach (Phuket) outlook for the next 16 days, and honestly, it's a bit of a heartbreaker. The water temp is sitting at 87°, which is a touch warmer than normal for this time of year, so you'll be sweating in the lineup if you ever get in.
The whole run is a write-off, not a single good surf option in the 16-day window. We're staring down the barrel of a long, blank run. The first few days, from Friday, 24 July, right through the weekend, are plagued by bumpy, cross-shore winds and messy conditions. The swell is there, but it's useless. The wind's just tearing it apart.
The next week, from Monday, 28 July, you'll see the swell size jump up, hitting 7 ft to 7 ft from the west. The combined wave energy climbs into the hundreds (470 to 597), but the wind is a strong, onshore howl. It's a washing machine. The period is only 7 to 8 seconds, so it's windswell junk. For a beach and reef setup, this is more interesting for kite surfing than paddle surfing. It's messy, lumpy, and just nasty.
We get a weird drop on Thursday, 30 July, with barely a ripple (0.3 ft swell) and a super long 21-second period, but the energy is almost zero (8). That's a ghost swell. It's inconsistent, and the wind is still onshore.
Then, into the second week, it's the same story. The swell comes back up on Monday, 3 August, hitting 10 ft from the west. That's a big number, only for experts. The combined energy is off the charts at 1782, but with a strong breeze from the WSW again, it's just a dangerous, messy close-out. The period is still short, 8 to 10 seconds.
The rest of the run, right up to Saturday, 8 August, is a mix of onshore winds and lumpy seas. The swell never really lines up with the wind. Nai Harn is a beautiful spot, but it's inconsistent and it's just not happening this window. Forecasts can change, but right now, the paddle is not worth the pain.
Rusty
Short Range ForecastModerate rain (total 19mm), heaviest on Fri morning. Warm (max 29°C on Fri afternoon, min 28°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 43mm), heaviest during Tue night. Warm (max 29°C on Mon morning, min 28°C on Mon afternoon). Mainly fresh winds. | ||||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | |||||||||||||||
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 5 | W 6 | WNW 6 | WNW 6 | W 6 | SW 15 | W 6 | W 7 | W 13 | W 7 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 | W 8 | W 22 | W 15 | W 21 | W 20 |
Wave Graph  | |||||||||||||||||||||
 kJ | 45 | 74 | 97 | 126 | 141 | 8 | 0 | 277 | 3 | 384 | 368 | 0 | 470 | 466 | 0 | 597 | 476 | 10 | 4 | 8 | 7 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | 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-on | on | cross-on | cross-on | on | on |
High Tide | 6:53PM1.09m | 7:35AM1.42m | 8:19PM1.15m | 8:36AM1.52m | 9:13PM1.25m | 9:22AM1.64m | 9:52PM1.36m | 9:59AM1.75m | 10:26PM1.46m | 10:32AM1.85m | 10:58PM1.55m | 11:03AM1.92m | 11:28PM1.63m | ||||||||
Low Tide | 1:10PM0.75m | 00:40AM0.72m | 2:28PM0.66m | 1:59AM0.67m | 3:18PM0.54m | 2:55AM0.58m | 3:55PM0.42m | 3:37AM0.47m | 4:28PM0.31m | 4:14AM0.38m | 4:58PM0.22m | 4:47AM0.30m | 5:27PM0.14m | ||||||||
 | |  | | |  | | | | | | | | | | | |  | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:46 | — | — | 6:46 | — |
mm | 4 | 1 | 5 | 3 | 2 | — | 2 | 2 | — | 1 | 3 | 2 | 5 | 3 | 12 | 4 | 4 | 9 | 2 | 3 | 4 |
Temp °C | 28 | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 29 |
Feels °C | 29 | 29 | 29 | 27 | 27 | 30 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 26 | 26 | 27 | 26 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | W 16 | W 16 | W 17 | WSW 16 | WSW 15 | SW 15 | — | — | W 13 | — | — | — | — | W 12 | — | — | W 16 | W 16 | W 8 | W 9 | W 9 |
| kJ | 5 | 5 | 6 | 24 | 23 | 8 | — | — | 3 | — | — | — | — | 3 | — | — | 5 | 5 | 439 | 435 | 348 |
Swell 2 Height (m) Direction Period (s) | W 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | W 22 | SSE 4 | SSE 4 | SSE 4 |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 10 | 2 | 2 | 4 |
Swell 3 Height (m) Direction Period (s) | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 15 | W 21 | W 20 |
| kJ | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 8 | 7 |
Wind waves Height (m) Direction Period (s) | W 5 | W 6 | WNW 6 | WNW 6 | W 6 | W 6 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 | W 8 | W 8 | S 4 | — | — |
| kJ | 45 | 74 | 97 | 126 | 141 | 146 | 200 | 277 | 274 | 384 | 368 | 311 | 470 | 466 | 478 | 597 | 476 | 501 | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 617 | 617 | 635 | 635 | 635 | 636 | 636 | 636 | 635 | 635 | 24 | 601 | 635 | 601 | 24 | 635 | 601 | 601 | 635 | 24 | 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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