Seattle Tide Chart (WA)

Seattle (WA) tide times, Jul 29 – Aug 6

Day	Time	Tide	Height
Wed Jul 29	12:11 AM	Low	7.1 ft (2.15 m)
	4:37 AM	High	9.7 ft (2.94 m)
	11:33 AM	Low	-1.4 ft (-0.41 m)
	7:09 PM	High	11.3 ft (3.44 m)
Thu Jul 30	12:36 AM	Low	6.6 ft (2.01 m)
	5:18 AM	High	9.7 ft (2.95 m)
	12:08 PM	Low	-1.3 ft (-0.39 m)
	7:29 PM	High	11.4 ft (3.47 m)
Fri Jul 31	1:05 AM	Low	6.0 ft (1.83 m)
	6:00 AM	High	9.6 ft (2.92 m)
	12:43 PM	Low	-0.9 ft (-0.28 m)
	7:50 PM	High	11.6 ft (3.52 m)
Sat Aug 1	1:38 AM	Low	5.2 ft (1.59 m)
	6:46 AM	High	9.4 ft (2.87 m)
	1:18 PM	Low	-0.2 ft (-0.07 m)
	8:13 PM	High	11.7 ft (3.56 m)
Sun Aug 2	2:15 AM	Low	4.3 ft (1.30 m)
	7:36 AM	High	9.2 ft (2.79 m)
	1:54 PM	Low	0.8 ft (0.25 m)
	8:39 PM	High	11.7 ft (3.58 m)
Mon Aug 3	2:56 AM	Low	3.2 ft (0.99 m)
	8:32 AM	High	8.9 ft (2.70 m)
	2:31 PM	Low	2.2 ft (0.67 m)
	9:06 PM	High	11.7 ft (3.57 m)
Tue Aug 4	3:41 AM	Low	2.2 ft (0.66 m)
	9:36 AM	High	8.6 ft (2.62 m)
	3:11 PM	Low	3.8 ft (1.16 m)
	9:36 PM	High	11.5 ft (3.52 m)
Wed Aug 5	4:31 AM	Low	1.2 ft (0.35 m)
	10:52 AM	High	8.4 ft (2.56 m)
	3:57 PM	Low	5.5 ft (1.68 m)
	10:10 PM	High	11.3 ft (3.45 m)
Thu Aug 6	5:25 AM	Low	0.3 ft (0.08 m)
	12:29 PM	High	8.5 ft (2.61 m)
	4:57 PM	Low	7.0 ft (2.15 m)
	10:52 PM	High	11.0 ft (3.36 m)

Seattle runs mixed-semidiurnal water: two highs and two lows daily, unequal by ~2.4 ft between successive highs this week. This is a big-tide station: an average swing this week moves 7.5 ft, so the water line, current and structure change dramatically through a single cycle. A 12.7 ft swing — Seattle's biggest this table — runs from the 12:08 PM low on Thu Jul 30 into the next high. Seattle tops out at 11.7 ft (Sun Aug 2 8:39 PM) and bottoms at -1.4 ft (Wed Jul 29 11:33 AM).

Moving-water windows — Seattle

Seattle mid-swing times below mark predicted peak flow on its 7.5 ft average cycle (why moving water matters):

• Wed Jul 29: 2:24 AM — 2.6 ft flood · 8:05 AM — 11.0 ft ebb · 3:21 PM — 12.6 ft flood · 9:52 PM — 4.7 ft ebb
• Thu Jul 30: 2:57 AM — 3.1 ft flood · 8:43 AM — 11.0 ft ebb · 3:48 PM — 12.7 ft flood · 10:17 PM — 5.4 ft ebb

Seattle numbers: NOAA CO-OPS #9447130 (Seattle (madison St.), Elliott Bay), 0.7 km off Seattle center; this open-water pick beat 10 closer-in candidates. On a coast that swings 7.5 ft, storm surge stacked on the 11.7 ft high is a real hazard at Seattle — predictions are astronomical only. All Seattle times station-local, refreshed 2026-07-29.