Surf Forecasts:
Threes surf forecast from 20 Jul 2026:
- Best quality surf: Sunday 26 Jul, 1AM (local time) - 3.5ft (1.0m), 10s period, WSW swell with cross-offshore winds.
- Most powerful swell: Sunday 26 Jul, 10AM (local time) - 3.5ft (1.1m), 10s period, WSW swell with 245 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 1PM (local time) - 2.5ft (0.7m), 7s period with SW swell.
Best Forecast Surf Conditions for Threes this week:
The surf forecast for Threes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 21) at 1PM. The primary swell is predicted to be 0.7m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Threes in the next 16 days are 1.1m 10s and forecast to arrive on Sunday (Jul 26) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Thursday (Jul 23) at 4PM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Tue 21st Jul) | 2.5ft (0.7m) 7s |
| Best Surf | 1AM (Sun 26th Jul) | 3.5ft (1.0m) 10s |
| Most Powerful | 10AM (Sun 26th Jul) | 3.5ft (1.1m) 10s |
Table - best surf conditions forecast for Threes over the next 16 days.
Short Range ForecastHeavy rain (total 30mm), heaviest during Wed night. Warm (max 29°C on Thu afternoon, min 27°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 29°C on Fri morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 8 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 62 | 49 | 79 | 82 | 118 | 116 | 129 | 114 | 120 | 140 | 128 | 134 | 141 | 144 | 131 | 209 | 245 | 197 | 143 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | cross-off | cross-on | cross-on | cross-on | on | glassy | on | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
High Tide | 00:34AM0.72m | 1:26PM0.52m | 1:07AM0.70m | 3:06PM0.52m | 1:44AM0.69m | 4:45PM0.55m | 2:26AM0.68m | 6:00PM0.59m | 3:15AM0.67m | 6:52PM0.63m | 4:06AM0.67m | 7:32PM0.66m | |||||||
Low Tide | 7:23AM0.19m | 6:40PM0.31m | 8:22AM0.13m | 7:34PM0.41m | 9:21AM0.08m | 8:43PM0.47m | 10:16AM0.04m | 10:03PM0.51m | 11:07AM0.00m | 11:14PM0.52m | 11:52AM-0.03m | 00:10AM0.52m | |||||||
 |  |  |  | | | | | | |  | |  | | | |  | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | — | 6:51 | — | — | 6:51 | — | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — |
mm | 3 | — | 1 | 1 | 1 | 3 | 13 | 5 | 3 | 3 | — | — | — | — | — | — | 1 | — | 1 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 29 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 32 | 30 | 30 | 30 | 31 | 30 | 30 | 32 | 33 | 32 | 33 | 31 | 31 | 32 | 31 | 31 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 8 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 |
| kJ | 62 | 49 | 79 | 82 | 118 | 116 | 129 | 114 | 120 | 140 | 128 | 134 | 141 | 144 | 131 | 209 | 245 | 197 | 143 |
Swell 2 Height (m) Direction Period (s) | E 9 | S 6 | E 9 | SE 11 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 |
| kJ | 42 | 19 | 41 | 73 | 64 | 61 | 58 | 70 | 87 | 94 | 96 | 98 | 98 | 96 | 96 | 77 | 76 | 45 | 36 |
Swell 3 Height (m) Direction Period (s) | S 5 | E 9 | SE 10 | E 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 10 | ENE 9 | ENE 9 | ENE 9 |
| kJ | 13 | 41 | 35 | 41 | 27 | 27 | 27 | 26 | 31 | 26 | 30 | 29 | 29 | 24 | 24 | 31 | 26 | 26 | 26 |
Wind waves Height (m) Direction Period (s) | — | — | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 8 | E 3 | E 3 |
| kJ | — | — | 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | 23 | 1 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 1873 | 2263 | 18 | 255 | 255 | 14 | 0 | 14 | 14 | 14 | 2060 | 0 | 0 | 0 | 0 | 0 | 0 | 2036 |
Best forecast wave conditions in Guam | |||||||||||||||||||
Best forecast wave conditions in Guam | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 Threes 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 Threes Surf forecast
The above surf forecast table for Threes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Threes can be found by selecting the local surf guide option on the grey menu. Our Threes 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 (Threes) 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 Threes 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.
Threes is 25 km (16 miles) from Agana. If you plan a holiday in Guam, look for hotels and other accommodation in Agana. Agana has rooms for a wide range of budgets as well as car hire and transport links.
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