Boat Basin Lefts Surf Forecast

/ Guam (16 surf breaks) /

Guam (16 surf breaks)

Surf Forecasts:

Boat Basin Lefts surfForecast / Guam / Guam

48hr Weather and Surf, issued 9 pm Sunday 31 Aug 2025 ChST

Forecast update in hr min s Forecast update imminent

Boat Basin Lefts surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Boat Basin Lefts sea temperature is 29.7° C
(Which is normal for this time of year)

How big are the waves at Boat Basin Lefts today?

The current surf forecast for Boat Basin Lefts at 10PM is: 0.9m 8s primary swell from a East direction (forecast issued at 09:00pm August 31). An open ocean swell of 0.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (ChST) & Date	Wave Height	Wave Period
Morning (31 Aug)	-	-
Afternoon (31 Aug)	-	-
Evening (31 Aug)	3ft (0.9m)	8s

Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Sun 31		Monday 01								Tuesday 02								Wednesday 03
	7 PM	10 PM	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM	7 PM	10 PM	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM	7 PM	10 PM	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM
Rating (10 max)	0	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	1	1	1	1	1	0	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	N	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	ENE	E	E	E	E	N	E	E
Period(s) (?)	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	8	9	8	9	9	9	11	9	9
Wave Graph (?)
Energy (?)	1	114	114	91	90	90	94	90	69	69	85	101	103	39	39	37	110	131	126	137	61	21	145	144
Wind (km/h)	SSE	SSE	SE	SE	SE	ESE	E	NE	NE	NE	NE	NE	ENE	E	E	ESE	SE	SE	SSE	SE	SE	SE	SE	SE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	off	off	off	off	cross- off	cross- off	cross	cross	cross	cross- off	cross- off	cross- off	cross- off	cross- off	off	off	off	off	off	off	off	off
High Tide / height (m)			11:49PM 0.79						4:51PM 0.71		12:31AM 0.78						5:58PM 0.75			1:34AM 0.78
Low Tide / height (m)	6:17PM 0.66					8:07AM 0.26				7:30PM 0.70				9:11AM 0.24				9:17PM 0.72					10:11AM 0.21

	Sun 31		Monday 01								Tuesday 02								Wednesday 03
Sunrise	-	-	-	-	6:09	-	-	-	-	-	-	-	6:09	-	-	-	-	-	-	-	6:09	-	-	-
Sunset	-	-	-	-	-	-	-	6:31	-	-	-	-	-	-	-	6:31	-	-	-	-	-	-	-	6:30

Rain (mm)	-	-	-	-	-	-	-	2	1	-	-	1	-	3	1	5	2	4	7	3	1	-	1	-
Temp. °C	29	29	28	28	28	29	30	29	29	28	28	28	28	28	29	25	25	25	24	24	25	27	28	29
Feels °C (?)	32	33	31	32	31	32	33	32	32	30	30	30	30	30	30	25	27	27	26	27	28	30	29	30

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Guam

Wind Update Continuing clean conditions at Boat Basin Lefts (calm at Tamuning 3 km from Boat Basin Lefts). 0.2m 8s swell from the N to make surfable waves.
35 minutes ago Boat Basin Lefts

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Actual: 35 min ago

3 km/h

Clean

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