Puerto Rico tide station

Las Mareas tide times

Today, Monday, October 19, 2026: high tide at 5:47 PM (0.7 ft); low tide at 3:52 AM (0.1 ft). Water temperature 86.5 F at San Juan, La Puntilla, San Juan Bay (37 mi away).

NOAA station 9755679 · Reference station · MLLW datum · times in AST · sunrise 6:19 AM, sunset 6:00 PM · first quarter (61% lit)

Low tide▼

3:52AM

0.1FT MLLW

low

High tide▲

5:47PM

0.7FT MLLW

high

Water temp°F

86.5

30.3C

San Juan, La Puntilla, San Juan Bay, 37 mi

predicted height above MLLWnightnow (build time; your browser updates it)

As of 5:20 AM the tide is rising toward high tide at 5:47 PM (0.7 ft).

First Quarter 61% litSunrise 6:19 AMSunset 6:00 PMDaylight 11h 40mAST

High tide at Las Mareas, Puerto Rico on October 19, 2026 is at 5:47 PM (0.7 ft above MLLW).
Low tide at Las Mareas on October 19, 2026 is at 3:52 AM (0.1 ft).
Today's tidal range at Las Mareas is 0.6 ft (highest high 0.7 ft, lowest low 0.1 ft).
The nearest NOAA water temperature to Las Mareas is 86.5 F at San Juan, La Puntilla, San Juan Bay (37 mi away), as of October 19, 2026.
Sunrise 6:19 AM, sunset 6:00 PM (AST); moon first quarter, 61% illuminated.
Predictions are NOAA CO-OPS tide predictions for station 9755679 (harmonic reference station), heights above MLLW.

Next 7 days at Las Mareas

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Mon Oct 19today	3:52 AM0.1 ft	5:47 PM0.7 ft			6:19 AM	6:00 PM	61%
Tue Oct 20	4:07 AM0.1 ft	6:20 PM0.6 ft			6:20 AM	5:59 PM	71%
Wed Oct 21	2:03 AM0.2 ft	7:21 AM0.3 ft	11:44 AM0.2 ft	6:48 PM0.5 ft	6:20 AM	5:59 PM	80%
Thu Oct 22	1:14 AM0.2 ft	8:03 AM0.4 ft	12:50 PM0.3 ft	6:53 PM0.4 ft	6:20 AM	5:58 PM	88%
Fri Oct 23	1:14 AM0.2 ft	8:48 AM0.5 ft	2:24 PM0.3 ft	6:01 PM0.3 ft	6:20 AM	5:57 PM	94%
Sat Oct 24	1:16 AM0.1 ft	9:29 AM0.6 ft			6:21 AM	5:57 PM	98%
Sun Oct 25	12:33 AM0.1 ft	10:08 AM0.7 ft			6:21 AM	5:56 PM	100%

Water temperature near Las Mareas

86.5 F (30.3 C)

NOAA CO-OPS station 9755371 (San Juan, La Puntilla, San Juan Bay sensor, 37 mi away), read 5:00 AM local, October 19, 2026

Over the past 30 days this sensor ranged from 85.1 to 87.6 F. Typical for October here is 86.2 F (5-year hourly mean; range 82.8 to 88.7), so today is 0.3 F above typical.

Water temperature is the nearest NOAA reading to Las Mareas, not a measurement at the tide gauge itself (this station has no water-temperature sensor). See water temperature by state for every sensor and buoy.

Tide tables

High (▲) and low (▼) tides in AST with sunrise, sunset and moon illumination. CSV of today's tides for every Puerto Rico station.

October 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Thu Oct 1					6:15 AM	6:13 PM	72%
Fri Oct 2					6:15 AM	6:13 PM	62%
Sat Oct 3					6:15 AM	6:12 PM	52%
Sun Oct 4					6:16 AM	6:11 PM	41%
Mon Oct 5					6:16 AM	6:10 PM	31%
Tue Oct 6					6:16 AM	6:09 PM	22%
Wed Oct 7					6:16 AM	6:09 PM	14%
Thu Oct 8					6:16 AM	6:08 PM	7%
Fri Oct 9					6:17 AM	6:07 PM	3%
Sat Oct 10					6:17 AM	6:06 PM	0%
Sun Oct 11					6:17 AM	6:05 PM	0%
Mon Oct 12					6:17 AM	6:05 PM	2%
Tue Oct 13					6:18 AM	6:04 PM	7%
Wed Oct 14					6:18 AM	6:03 PM	13%
Thu Oct 15					6:18 AM	6:03 PM	21%
Fri Oct 16					6:18 AM	6:02 PM	30%
Sat Oct 17	2:51 AM-0.0 ft	4:15 PM0.7 ft			6:19 AM	6:01 PM	40%
Sun Oct 18	3:26 AM-0.0 ft	5:06 PM0.7 ft			6:19 AM	6:00 PM	51%
Mon Oct 19today	3:52 AM0.1 ft	5:47 PM0.7 ft			6:19 AM	6:00 PM	61%
Tue Oct 20	4:07 AM0.1 ft	6:20 PM0.6 ft			6:20 AM	5:59 PM	71%
Wed Oct 21	2:03 AM0.2 ft	7:21 AM0.3 ft	11:44 AM0.2 ft	6:48 PM0.5 ft	6:20 AM	5:59 PM	80%
Thu Oct 22	1:14 AM0.2 ft	8:03 AM0.4 ft	12:50 PM0.3 ft	6:53 PM0.4 ft	6:20 AM	5:58 PM	88%
Fri Oct 23	1:14 AM0.2 ft	8:48 AM0.5 ft	2:24 PM0.3 ft	6:01 PM0.3 ft	6:20 AM	5:57 PM	94%
Sat Oct 24	1:16 AM0.1 ft	9:29 AM0.6 ft			6:21 AM	5:57 PM	98%
Sun Oct 25	12:33 AM0.1 ft	10:08 AM0.7 ft			6:21 AM	5:56 PM	100%
Mon Oct 26	12:29 AM-0.0 ft	10:51 AM0.8 ft			6:22 AM	5:56 PM	99%
Tue Oct 27	12:40 AM-0.1 ft	11:47 AM0.9 ft			6:22 AM	5:55 PM	97%
Wed Oct 28	12:48 AM-0.2 ft	1:01 PM0.9 ft			6:22 AM	5:54 PM	92%
Thu Oct 29	12:58 AM-0.2 ft	2:04 PM0.9 ft			6:23 AM	5:54 PM	85%
Fri Oct 30	1:25 AM-0.2 ft	2:57 PM0.9 ft			6:23 AM	5:53 PM	77%
Sat Oct 31	1:59 AM-0.2 ft	3:49 PM0.8 ft			6:23 AM	5:53 PM	68%

November 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Sun Nov 1	2:35 AM-0.1 ft	4:42 PM0.8 ft			6:24 AM	5:52 PM	57%
Mon Nov 2	3:03 AM-0.0 ft	5:23 PM0.6 ft			6:24 AM	5:52 PM	47%
Tue Nov 3	3:13 AM0.1 ft	5:51 PM0.5 ft			6:25 AM	5:52 PM	36%
Wed Nov 4	1:25 AM0.2 ft	9:40 AM0.4 ft	11:59 AM0.4 ft	3:21 PM0.4 ft	6:25 AM	5:51 PM	27%
Thu Nov 5	12:26 AM0.1 ft	9:41 AM0.5 ft			6:26 AM	5:51 PM	18%
Fri Nov 6	12:20 AM0.1 ft	9:20 AM0.6 ft			6:26 AM	5:50 PM	10%
Sat Nov 7	12:14 AM0.0 ft	9:34 AM0.7 ft	11:48 PM-0.1 ft		6:26 AM	5:50 PM	5%
Sun Nov 8	10:01 AM0.8 ft				6:27 AM	5:50 PM	1%
Mon Nov 9	12:02 AM-0.1 ft	10:31 AM0.8 ft			6:27 AM	5:49 PM	0%
Tue Nov 10	12:26 AM-0.2 ft	11:06 AM0.8 ft			6:28 AM	5:49 PM	1%
Wed Nov 11	12:50 AM-0.2 ft	11:53 AM0.8 ft			6:28 AM	5:49 PM	4%
Thu Nov 12	1:11 AM-0.2 ft	12:56 PM0.8 ft			6:29 AM	5:49 PM	9%
Fri Nov 13	1:21 AM-0.1 ft	1:50 PM0.8 ft			6:29 AM	5:48 PM	16%
Sat Nov 14	1:34 AM-0.1 ft	2:32 PM0.8 ft			6:30 AM	5:48 PM	25%
Sun Nov 15	1:56 AM-0.1 ft	3:09 PM0.7 ft			6:31 AM	5:48 PM	35%
Mon Nov 16	2:18 AM0.0 ft	3:47 PM0.7 ft			6:31 AM	5:48 PM	45%
Tue Nov 17	2:01 AM0.1 ft	4:23 PM0.6 ft			6:32 AM	5:48 PM	56%
Wed Nov 18	12:48 AM0.1 ft	3:39 PM0.5 ft			6:32 AM	5:47 PM	66%
Thu Nov 19	12:14 AM0.1 ft	9:04 AM0.4 ft	12:20 PM0.4 ft	3:24 PM0.4 ft	6:33 AM	5:47 PM	76%
Fri Nov 20	12:08 AM0.1 ft	8:09 AM0.6 ft			6:33 AM	5:47 PM	84%
Sat Nov 21	12:14 AM0.0 ft	8:46 AM0.7 ft	11:56 PM-0.0 ft		6:34 AM	5:47 PM	91%
Sun Nov 22	9:25 AM0.8 ft	11:34 PM-0.1 ft			6:34 AM	5:47 PM	96%
Mon Nov 23	10:04 AM0.9 ft	11:51 PM-0.2 ft			6:35 AM	5:47 PM	99%
Tue Nov 24	10:46 AM1.0 ft				6:36 AM	5:47 PM	100%
Wed Nov 25	12:14 AM-0.3 ft	11:37 AM1.0 ft			6:36 AM	5:47 PM	99%
Thu Nov 26	12:36 AM-0.3 ft	12:39 PM1.0 ft			6:37 AM	5:47 PM	95%
Fri Nov 27	12:52 AM-0.3 ft	1:39 PM1.0 ft			6:37 AM	5:47 PM	89%
Sat Nov 28	1:06 AM-0.2 ft	2:24 PM0.9 ft			6:38 AM	5:47 PM	82%
Sun Nov 29	1:24 AM-0.1 ft	3:01 PM0.8 ft			6:39 AM	5:47 PM	73%
Mon Nov 30	1:40 AM-0.0 ft	3:29 PM0.6 ft			6:39 AM	5:48 PM	63%

Tidal datums at Las Mareas

Heights on this page are above mean lower low water (MLLW), the chart datum. NOAA's accepted datums for station 9755679, in feet above MLLW:

MHHW

13.84 ft

Mean higher high water

MHW

13.83 ft

Mean high water

MSL

13.50 ft

Mean sea level

MLW

13.19 ft

Mean low water

0.64 ft

Mean range

0.67 ft

Diurnal range

Nearby tide stations

Central Aguirre4.7 mi · next high 6:17 PM
Santa Isabel16 mi · next high 6:33 PM
Puerto Maunabo18 mi · next high 5:10 PM
Yabucoa Harbor23 mi · next high 4:54 PM
Palmas del Mar26 mi · next high 4:33 PM
Ponce30 mi · next high 5:24 PM

Questions

What time is high tide at Las Mareas today?

High tide at Las Mareas, Puerto Rico on Monday, October 19, 2026 is at 5:47 PM (0.7 ft above MLLW), NOAA prediction, local time.

What time is low tide at Las Mareas today?

Low tide at Las Mareas on Monday, October 19, 2026 is at 3:52 AM (0.1 ft).

What is the water temperature at Las Mareas?

The nearest NOAA water-temperature reading to Las Mareas is 86.5 F at San Juan, La Puntilla, San Juan Bay (37 mi away), as of October 19, 2026.

Not for navigation. Predictions do not include weather; wind and pressure can move the real water level by a foot or more. Source: NOAA CO-OPS station 9755679.