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 am Saturday 25 Oct 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 29.3° 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 2PM is: 1.1m 8s primary swell from a East direction and 0.4m 9s secondary swell from a North direction (forecast issued at 09:00am October 25). The wind direction is predicted to be cross-offshore.

Time (ChST) & Date	Wave Height	Wave Period
Morning (25 Oct)	3.5ft (1.1m)	8s
Afternoon (25 Oct)	3.5ft (1.1m)	8s
Evening (25 Oct)	3.5ft (1.0m)	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

	Saturday 25						Sunday 26								Monday 27								Tue 28
	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	7 PM	10 PM	1 AM	4 AM
Rating (10 max)	2	2	1	1	2	2	2	2	1	1	0	0	0	0	0	0	1	0	1	1	1	1	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	E	E	E	E	E	E	E	E	N	N	N	N	N	N	N	N	E	E	E	E	ENE	E	E	E
Period(s) (?)	8	8	8	8	8	8	8	8	10	10	10	10	10	10	10	10	9	8	9	10	10	9	9	9
Wave Graph (?)
kJ (?)	173	169	169	169	140	140	140	140	94	87	125	128	123	125	122	88	234	200	320	262	197	276	276	274
Wind (km/h)	E	E	E	E	ESE	ESE	SE	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	cross- off	off	off	off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off
High Tide / height (m)			10:54AM 0.83			8:34PM 0.81					11:45AM 0.81			9:01PM 0.79					12:43PM 0.79			9:30PM 0.78
Low Tide / height (m)				3:53PM 0.65					4:06AM 0.15				4:32PM 0.67				4:47AM 0.17				5:18PM 0.69

	Saturday 25						Sunday 26								Monday 27								Tue 28
Sunrise	6:13	-	-	-	-	-	-	-	6:13	-	-	-	-	-	-	-	6:13	-	-	-	-	-	-	-
Sunset	-	-	-	5:57	-	-	-	-	-	-	-	5:55	-	-	-	-	-	-	-	5:55	-	-	-	-

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

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 (light winds from the NNW at Tamuning 3 km from Boat Basin Lefts). 1.1m 8s swell from the E to make surfable waves.
1 hour 31 minutes ago Boat Basin Lefts

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1 h 31 min ago

6 km/h

NNW

Clean

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