Barron Rivermouth Surf Forecast and Surf Report

Alright, let’s get into it. Barron Rivermouth (Guam) – a point/river setup that’s fairly consistent, but the next couple of weeks are going to be a struggle. The water’s warm at 32.1°, which is much warmer than usual for this time of year, so forget the rubber.

The overall picture is small and messy. Swell energy is mostly moderate, with readings in the 200s and 300s, some pulses in the 400s and 500s, and one real spike up to 829. But the wave heights are tiny – 1 to 3 feet at best. The swell direction is consistently southwest, which is right for this spot, but the winds are the problem. Most afternoons are blown out with cross-onshore breezes, and the mornings are often just marginal.

Here’s how it all shakes out.

Saturday, September 12 – Afternoon is a dud. 2-foot southwest swell, 14-second period, but a 20 km/h WNW cross-on wind has it chopped. Poor.

Sunday, September 13 – Morning has 2 feet of southwest, 13-second period, with a light WSW onshore. Marginal. Afternoon, 15 km/h WNW cross-on, poor.

Monday, September 14 – This is your first clean window. Morning has 1.5 to 2 feet of southwest swell, but the period jumps to 18 seconds – real groundswell. And the wind is glassy with a light SSE. It’s small, but it’s clean. At a river mouth, that long period might make it a bit walled, but it’s the best we get early. Afternoon goes back to the cross-on WNW and it’s poor.

Tuesday, September 15 – Morning, 2.5 feet, 16 seconds, light SSW cross-on. Marginal. Afternoon, west onshore at 15 km/h, poor.

Wednesday, September 16 – Morning has the swell pushing to 3 feet, southwest, 16 seconds, with a light WNW cross-on. Energy is building into the 569 range. Still marginal, but there’s some size. Afternoon, 20 km/h WNW cross-on, chopped.

Thursday, September 17 – Morning, 2.5 feet, 14 seconds, WSW onshore. Marginal. Afternoon, 20 km/h WNW cross-on, poor.

Friday, September 18 – Morning, 2 feet, 19-second period – long period but tiny. Light SW cross-on. Marginal. Afternoon, 20 km/h NW cross-on, poor.

Saturday, September 19 – Morning, 2.5 feet, 18 seconds, light SSW cross-on. Marginal. Afternoon, the wind swings south at 5 km/h, light cross-shore. Still only 2.5 feet, but cleaner. Marginal, but a chance.

Sunday, September 20 – This is the pick of the entire run. Morning has 3 feet of southwest swell with a 19-second period, and the energy jumps to 829 – the strongest we see. The wind is a light southerly at 10 km/h, cross-onshore but manageable. It’s still only 3 feet, but with that long period and the river mouth setup, it could have some push if the tide behaves. This is your best bet. Afternoon drops off with a west onshore.

Monday, September 21 – Morning, 3 feet, 17 seconds, WSW onshore. Marginal. Afternoon, west cross-on, marginal.

Tuesday, September 22 – Morning, risk of thunderstorms, 3 feet, 16 seconds, light south cross-shore. Marginal. Afternoon, WSW onshore, marginal.

Wednesday, September 23 – Morning, 2.5 feet, 15 seconds, SSE cross-shore at 15 km/h. Marginal. Afternoon, risk tstorms, SW onshore, marginal.

Thursday, September 24 – Morning, 2.5 feet, 14 seconds, light south cross-on. Marginal. Afternoon, west cross-on, poor.

Friday, September 25 – Morning, 2.5 feet, 13 seconds, west onshore. Marginal. Afternoon, 2 feet, WNW cross-on at 15 km/h, poor.

Saturday, September 26 – Morning, 2 feet, 12 seconds, SW onshore. Marginal. Afternoon, 1 to 1.5 feet, but the period jumps to 19 seconds. Still, with the WNW cross-on, poor.

Sunday, September 27 – Morning, 2 feet, 17 seconds, west onshore. Marginal. Afternoon

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