Surf spot

Boat Basin Lefts

Forecast conditions and map view for Boat Basin Lefts in Micronesia, Guam. Open the interactive surf map to inspect wind, waves, and nearby spots.

Country: Micronesia, Guam
Coordinates: 13.4829, 144.7516

Metric
Metric	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00
Wave height (m)	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.5	0.6	0.6	0.6	0.6	0.6	0.6	0.7	0.7	0.7	0.8	0.9	0.9	0.9	1	0.9	0.9	0.9	0.9	1
Wave direction	NE	NE	NE	NE	NE	NE	NE	NE	NE	NNE	NNE	NNE	NNE	NNE	NE	E	E	E	E	NE	NE	NE	NE	NE	NE	E	NE	NE	E	E	E	E	E	E	E	E	E	E	E	E	E	E	ENE	E	E	SW	SW	SW	SW	SW	WSW	WSW	WSW	SW	WSW	WSW
Wave period (s)	6.8	6.8	6.8	6.8	6.8	6.9	7	7.1	7.1	7	6.9	6.9	7	6.7	7	7	6.7	6.7	6.7	7.2	7.2	7.2	7.3	7.2	7.2	6.8	7.4	6.8	6.8	6.8	6.7	6.8	6.5	6.7	6.4	6.5	6.3	6.7	6.7	6.8	6.8	7	8.8	8.4	8.4	6.3	6.3	6.5	6.3	5.6	5.7	6	6	6.5	6.2	5.2
Wave energy (kJ)	31	31	31	31	32	32	33	34	34	31	30	30	30	30	32	32	30	30	32	40	40	39	40	40	40	36	34	29	31	31	30	31	29	30	28	26	21	32	32	36	38	41	48	61	65	44	51	64	64	55	60	60	59	62	64	58
Wind speed (km/h)	8	5.8	6.9	8.8	13.6	14	10.8	10.6	8	8.1	9	10.8	12.1	12.4	11.2	8.8	4.8	7.1	9.9	12.6	12.6	14.4	14.7	11.3	10.8	13.4	8.9	14.6	10.7	8.7	8.2	5.8	3.3	8.4	8	12.2	13.2	14.8	15.4	16.5	20.5	26.6	28.5	31.3	35.7	36.4	34.9	32.3	34.6	34.8	37.9	38.5	39	37.7	28.2	26.2
Wind direction	ENECross-off	ENECross	ENECross	ENECross-off	NECross	ENECross	ENECross-off	ENECross	ENECross	ENECross-off	ENECross-off	ENECross-off	ENECross-off	ECross-off	ECross-off	ENECross-off	ENEGlassy	NECross	NECross	NECross	NNECross-on	NNECross-on	NNECross-on	NECross	NNECross-on	NECross-on	ENECross-off	NECross	NECross	NECross	NNECross-on	NCross-on	NWGlassy	NWOnshore	NNWOnshore	NWOnshore	NWOnshore	WNWOnshore	WNWCross-on	WCross-on	WCross-on	WCross-on	WCross-on	WCross-on	WBlown out	WBlown out	WCross-on	WCross-on	WSWCross-on	WSWCross	SWBlown out	SWBlown out	WSWBlown out	SWBlown out	SWCross	SWCross

Boat Basin Lefts (Guam, Micronesia) is a reef break known for its left-hand wave peeling along the outer harbor/boat basin area in Guam. It’s generally considered a powerful, shallow, and sometimes unruly reef setup, best suited to experienced surfers who are comfortable surfing over coral and dealing with fast, localized surf.

What it’s like

Wave type: Reef break, left point-style peel
Direction: Lefts
Power: Can get punchy and hollow when conditions line up
Bottom: Coral reef / sharp reef
Best in: Tropical swell events, especially when swell direction and wind are favorable

Conditions

Works best with a combination of solid swell and light winds
Tends to be most surfed during the wet season / typhoon swells, when Pacific storm systems send energy into Guam
Can be sensitive to tide and wind, with the best shape often at mid to higher tide depending on the reef contour

Crowd and access

Being near a harbor/boat basin, it may be locally known and surfed by island regulars
Access can depend on local conditions, harbor activity, and reef exposure
Like many Guam reef breaks, it’s important to respect local surfers, shoreline access, and reef safety

Hazards

Very shallow reef
Coral cuts / reef injuries
Strong currents and inconsistent cleanup sets
Potential for crowded or localized conditions when it’s firing

Best for

Intermediate to advanced surfers
Surfers comfortable with reef surf etiquette
Those looking for a fast, hollow left in a tropical setting