Surf Forecasts:
Nai Harn Beach surf forecast from 20 Jun 2026:
- Best quality surf: Sunday 21 Jun, 10AM (local time) - 0.5ft (0.2m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 25 Jun, 4AM (local time) - 4ft (1.2m), 7s period, W swell with 146 kJ wave energy.
- Next surfable swell (1★+): Sunday 21 Jun, 10AM (local time) - 0.5ft (0.2m), 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 (Jun 21) at 10AM. The primary swell is predicted to be 0.2m and 16s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nai Harn Beach in the next 16 days are 1.2m 7s and forecast to arrive on Thursday (Jun 25) at 4AM. 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 7s period and expected on Monday (Jun 22) at 7PM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 21st Jun) | 0.5ft (0.2m) 16s |
| Best Surf | 10AM (Sun 21st Jun) | 0.5ft (0.2m) 16s |
| Most Powerful | 4AM (Thu 25th Jun) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 33mm), heaviest during Sat night. Warm (max 29°C on Sat morning, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Thu night. Warm (max 29°C on Tue morning, min 28°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 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 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | WSW 14 | WSW 14 | WSW 6 | WSW 6 | W 6 | W 6 | W 7 | W 7 | W 15 | W 7 | W 7 | WSW 16 | WSW 16 | WSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 18 | 30 | 25 | 23 | 28 | 104 | 20 | 19 | 44 | 55 | 74 | 59 | 73 | 120 | 18 | 130 | 130 | 24 | 24 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:14PM1.72m | 3:06AM1.44m | 3:04PM1.56m | 4:05AM1.41m | 4:00PM1.41m | 5:08AM1.40m | 5:07PM1.29m | 6:13AM1.43m | 6:22PM1.23m | 7:13AM1.48m | 7:33PM1.23m | 8:05AM1.55m | 8:31PM1.27m | ||||||||
Low Tide | 8:50PM0.30m | 8:55AM0.59m | 9:39PM0.40m | 10:00AM0.68m | 10:32PM0.49m | 11:16AM0.72m | 11:30PM0.55m | 12:37PM0.70m | 00:30AM0.58m | 1:46PM0.64m | 1:28AM0.57m | 2:39PM0.55m | 2:19AM0.54m | ||||||||
 |  |  | | | | | |  |  | | | | | | | | | | | | |
 | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — |
mm | 2 | — | 11 | 4 | — | 9 | 2 | 3 | 2 | — | — | 2 | 2 | — | 4 | 3 | — | 8 | 1 | — | 2 |
Temp °C | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 29 | 29 |
Feels °C | 31 | 31 | 30 | 29 | 29 | 28 | 27 | 28 | 29 | 30 | 29 | 30 | 31 | 31 | 30 | 31 | 28 | 29 | 31 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | WSW 15 | WSW 14 | WSW 14 | WSW 6 | WNW 8 | W 13 | W 6 | W 7 | W 16 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 |
| kJ | 28 | 18 | 30 | 18 | 18 | 28 | 21 | 20 | 19 | 44 | 37 | 3 | 59 | 73 | 5 | 152 | 130 | 130 | 135 | 135 | 127 |
Swell 2 Height (m) Direction Period (s) | W 13 | W 18 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | — | — | — | WSW 14 | WSW 13 | W 16 | WNW 7 | WSW 16 | W 12 | W 15 | W 15 | W 15 | WSW 16 | WSW 16 | WSW 16 |
| kJ | 3 | 6 | 26 | 25 | 23 | 22 | — | — | — | 18 | 18 | 5 | 5 | 25 | 3 | 18 | 18 | 18 | 24 | 24 | 25 |
Swell 3 Height (m) Direction Period (s) | W 18 | W 13 | W 13 | W 12 | — | — | — | — | — | — | W 17 | — | W 16 | W 13 | — | — | W 17 | — | S 3 | — | — |
| kJ | 6 | 3 | 3 | 3 | — | — | — | — | — | — | 6 | — | 5 | 3 | — | — | 6 | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | WNW 3 | WNW 3 | — | WNW 4 | W 4 | WNW 4 | W 7 | W 7 | W 6 | NW 6 | WSW 6 | W 6 | — | W 7 | W 7 | — | — | — | — | — | WNW 2 |
| kJ | 1 | 1 | — | 10 | 9 | 8 | 104 | 226 | 158 | 34 | 55 | 74 | — | 34 | 120 | — | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 97 | 635 | 4 | 0 | 4 | 4 | 4 | 4 | 797 | 782 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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