BUOY 139 (STORMSURF)

Surf Forecasts and Marine Weather - No Hype - Just the Facts!

Is Atmospheric Momentum The Key? - Video Forecast HERE (9/7/25)

Create Your Own Surf Forecast

Buoy 139 Umpqua Offshore
Longitude = 124.54W Latitude = 43.77N
FAQs

Frequency Analysis - Current Hour
(Swell height in each period/frequency band)

Measurement Date/Time (GMT)

09/17
20:21:00

Historical Surf Height...Time Lapse Spectral Density... Primary Swell Profile

Current Swell & Surf Analysis
Buoy 139
20:21:00 (GMT) on 09/17
Sea Height:	4.9 ft
Primary Swell Height:	3.6 ft
Primary Swell Period:	10.4 secs
Primary Swell Direction:	284 degrees
Surf Height:	3.0-3.8 ft

24 Hour Observation

Date
(Month - Day)

Time
(GMT)

Combined Sea Height
[>5 secs]
(ft)

Primary Swell

Secondary Swell

Tertiary Swell

Estimated Surf Height (ft)

Primary Swell Period
(secs)

Height
(ft)

Period
(secs)

Diection
(deg)

Height
(ft)

Period
(secs)

Direction
(deg)

Height
(ft)

Period
(secs)

Direction
(deg)

09/17	20:21:00	4.9	3.6	10.4	284	1.4	14.2	265	1.9	7.4	275	3.0 -3.8	10.4
09/17	19:21:00	5.2	3.8	10.8	287	1.8	14.4	263	2.3	7.7	274	3.2 -4.1	10.8
09/17	18:21:00	4.5	3.1	10.2	285	2.0	13.6	271	0.9	17.4	218	2.6 -3.2	10.2
09/17	17:21:00	4.6	3.4	10.8	284	1.6	14.2	260	2.0	7.7	272	2.9 -3.7	10.8
09/17	16:21:00	4.9	3.7	9.7	279	1.9	13.4	276	0.9	16.4	235	2.9 -3.6	9.7
09/17	15:21:00	4.7	3.4	10.7	278	1.7	14.3	255	1.8	7.7	270	2.9 -3.6	10.7
09/17	14:21:00	4.3	3.2	11.4	280	1.4	15.1	238	2.1	8.4	273	2.9 -3.6	11.4
09/17	13:21:00	3.8	2.7	11.4	275	1.3	15.3	236	1.8	8.3	277	2.5 -3.1	11.4
09/17	12:21:00	3.5	2.2	11.4	273	1.5	14.5	247	1.7	8.3	277	2.0 -2.5	11.4
09/17	11:21:00	3.3	2.0	12.0	265	1.1	15.4	224	1.8	8.7	274	1.9 -2.4	12.0
09/17	10:21:00	3.5	2.1	12.0	261	1.2	15.3	241	1.7	8.7	276	2.0 -2.5	12.0
09/17	09:21:00	3.7	2.4	10.2	270	1.5	13.7	261	0.7	17.4	230	2.0 -2.5	10.2
09/17	08:21:00	3.7	2.3	11.3	266	1.4	14.6	241	1.8	8.3	287	2.1 -2.6	11.3
09/17	07:21:00	3.8	2.0	12.0	261	1.3	15.5	233	2.0	8.9	282	1.9 -2.4	12.0
09/17	06:21:00	4.2	2.9	10.7	281	1.6	13.7	250	0.9	17.6	237	2.5 -3.1	10.7
09/17	05:21:00	4.3	2.8	10.3	286	1.4	13.6	251	1.9	7.1	294	2.3 -2.8	10.3
09/17	04:21:00	4.6	3.2	10.3	290	1.6	13.5	244	0.9	16.6	222	2.7 -3.3	10.3
09/17	03:21:00	4.7	3.5	10.8	281	1.5	14.3	236	1.8	7.7	289	3.1 -3.8	10.8
09/17	02:21:00	4.2	3.1	10.9	286	1.3	14.5	244	1.7	7.6	293	2.7 -3.4	10.9
09/17	01:21:00	4.3	3.4	10.7	280	1.3	14.4	232	1.6	7.7	282	2.9 -3.6	10.7
09/17	00:21:00	3.7	2.6	11.3	269	1.2	14.4	238	1.6	8.3	285	2.3 -2.9	11.3
09/16	23:21:00	4.2	3.1	10.8	279	1.2	14.5	241	0.6	17.7	222	2.7 -3.4	10.8
09/16	22:21:00	3.8	2.5	11.4	269	1.5	14.4	236	0.7	17.7	223	2.3 -2.9	11.4
09/16	21:21:00	4.4	3.1	10.7	283	1.4	14.3	249	0.6	17.7	206	2.6 -3.3	10.7

Surf Height Scale
Size Scale (ft)
>1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9-10 10-11 11-12 12-13 13-14 14-15 15-20 20-25 25-30 30-35 35-40 40-45 45+

Swell Period Scal
CDIP Period Scale (secs)
6.3 6.7 7.1 7.7 8.3 9.1 10 10.5 11.1 11.8 12.5 13.3 14.3 15.4 16.7 18.2 20 22.2 25 28.6 33.3 40

000015785 ___0.031729

Contact | About | Disclaimer | Privacy
Advertise/Content | Links