Surf Forecasts:
Mangandas surf forecast from 17 Sep 2026:
- Best quality surf: Sunday 20 Sep, 10PM (local time) - 3.5ft (1.1m), 8s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 23 Sep, 7PM (local time) - 7ft (2.1m), 7s period, SW swell with 440 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 10PM (local time) - 3.5ft (1.1m), 8s period with SW swell.
Best Forecast Surf Conditions for Mangandas this week:
The surf forecast for Mangandas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 10PM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.8m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Mangandas in the next 16 days are 2.1m 7s and forecast to arrive on Wednesday (Sep 23) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Wednesday (Sep 23) at 10AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 20th Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 10PM (Sun 20th Sep) | 3.5ft (1.1m) 8s |
| Most Powerful | 7PM (Wed 23rd Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Mangandas over the next 16 days.
Short Range ForecastModerate rain (total 17mm), heaviest on Sat afternoon. Warm (max 29°C on Thu morning, min 28°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Tue morning. Warm (max 29°C on Sun morning, min 27°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||
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) | NNE 8 | NNE 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | WSW 8 | SW 8 | SW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 10 | NNW 10 | NNW 12 | NNW 12 | SW 7 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 140 | 125 | 363 | 367 | 401 | 363 | 382 | 355 | 207 | 175 | 201 | 147 | 111 | 116 | 104 | 198 | 194 | 328 | 237 | 397 | 300 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | glassy | glassy | cross | cross | cross | cross-off | cross-off |
High Tide | 12:49PM0.60m | 10:31PM0.61m | 2:20PM0.59m | 11:05PM0.58m | 3:49PM0.59m | 00:01AM0.55m | 4:47PM0.61m | 1:36AM0.54m | 5:26PM0.63m | 3:11AM0.56m | 5:55PM0.65m | 4:22AM0.60m | 6:20PM0.67m | ||||||||
Low Tide | 5:51PM0.48m | 6:21AM0.08m | 7:01PM0.51m | 7:22AM0.09m | 8:32PM0.52m | 8:30AM0.10m | 9:54PM0.50m | 9:36AM0.09m | 10:47PM0.46m | 10:33AM0.08m | 11:26PM0.42m | 11:20AM0.07m | 00:00AM0.37m | ||||||||
 |  |  |  | | | | | | | | | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:21 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — |
mm | — | — | 1 | 1 | 2 | 3 | 1 | 5 | 4 | 1 | 3 | 2 | — | 2 | 4 | 5 | 3 | 4 | 4 | 5 | 5 |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 28 |
Feels °C | 31 | 30 | 31 | 30 | 31 | 32 | 31 | 31 | 31 | 33 | 33 | 33 | 32 | 33 | 32 | 30 | 28 | 27 | 28 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | S 7 | SW 8 | SW 8 | SW 8 | SW 8 | N 9 | N 9 | WSW 8 | WSW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | NNW 10 | ENE 10 | NNW 12 | NNW 12 | NNW 11 | WSW 8 |
| kJ | 140 | 112 | 363 | 367 | 401 | 363 | 73 | 99 | 207 | 175 | 201 | 147 | 102 | 86 | 104 | 198 | 204 | 328 | 237 | 158 | 300 |
Swell 2 Height (m) Direction Period (s) | SW 8 | NNE 8 | NNE 8 | NNE 10 | NNE 9 | NNE 9 | SE 8 | SE 8 | N 9 | N 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | WSW 7 | NNW 10 | NNE 7 | NE 10 | NE 9 | NNW 10 |
| kJ | 98 | 125 | 99 | 105 | 92 | 80 | 18 | 17 | 93 | 96 | 106 | 101 | 111 | 116 | 94 | 62 | 194 | 60 | 24 | 22 | 56 |
Swell 3 Height (m) Direction Period (s) | S 7 | WSW 8 | WSW 9 | ENE 12 | SE 9 | SE 8 | NE 11 | NE 10 | S 6 | S 6 | NE 11 | NE 10 | NE 10 | NE 12 | NE 11 | NE 11 | WSW 7 | SSE 8 | N 8 | SE 10 | NE 10 |
| kJ | 43 | 105 | 29 | 13 | 21 | 18 | 29 | 27 | 27 | 20 | 57 | 68 | 48 | 114 | 94 | 71 | 77 | 39 | 1 | 4 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SW 8 | SW 8 | — | — | — | — | — | — | — | — | W 3 | SW 7 | SSW 6 | SW 7 | SSE 6 |
| kJ | — | — | — | — | — | — | 382 | 355 | — | — | — | — | — | — | — | — | 1 | 131 | 303 | 397 | 82 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 18 | 21 | 21 | 238 | 21 | 21 | 21 | 238 | 21 | 21 | 18 | 13 | 0 | 0 | 0 | 1277 | 1277 | 1277 | 1907 | 1830 |
Best forecast wave conditions in Guam | |||||||||||||||||||||
Best forecast wave conditions in Guam | |||||||||||||||||||||
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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 Mangandas 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 Mangandas Surf forecast
The above surf forecast table for Mangandas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mangandas can be found by selecting the local surf guide option on the grey menu. Our Mangandas 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 (Mangandas) 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 Mangandas 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.
Mangandas is 14 km (9 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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