# Current Differences from San Francisco, Golden Gate
# CALIFORNIA COAST, South TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 109 Point Arguello 34 34 120 40 -2:21 -2:21 -2:21 -2:21 0.2 0.2
TC 113 Point San Luis 35 09 120 46 -2:01 -2:01 -2:01 -2:01 0.2 0.2
TC 117 Point Piedras Blancas 35 50 121 18 -1:29 -1:29 -1:29 -1:29 0.2 0.2
TC 121 Point Sur 36 18 121 55 -1:11 -1:11 -1:11 -1:11 0.2 0.2
TC 125 Point Pinos 36 38 121 57 -1:01 -1:01 -1:01 -1:01 0.2 0.2
# GOLDEN GATE and APPROACHES TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 141 Sea Buoy - "SF" 37 45 122 42 -0:30 -0:30 -0:30 -0:30 0.1 0.1
TC 145 Pt. Bonita Lt., 5.27 nmi WSW of 37 48.27 122 38.33 -1:52 -1:41 -1:41 -1:19 0.2 0.2
TC 149 Point Lobos, 5 miles west of 37 47 122 37 --- -0:10 --- -0:32 0.2 0.2
TC 153 Point Lobos, 3.73 nmi W of 37 47.25 122 35.32 -2:14 -1:09 -1:10 -0:49 0.3 0.2
TC 157 Point Lobos, 2.5 miles west of 37 46 122 34 --- +0:26 --- -1:26 0.3 0.5
TC 161 Point Lobos, 1.3 nmi SW of 37 46.30 122 32.13 -1:24 -0:57 -0:23 -0:24 0.4 0.3
TC 165 South Channel 37 45 122 32 -1:29 -1:27 -1:04 -1:10 0.4 0.4
TC 169 Point Lobos, 5.47 nmi SW of 37 43.23 122 35.87 -1:59 -2:08 -1:41 -1:28 0.2 0.2
TC 173 Bonita Channel approach 37 50 122 37 --- -0:16 --- -1:14 0.2 0.2
TC 177 Bonita Chan, off Tennessee Cove 37 50 122 34 --- -0:40 --- -1:14 0.4 0.2
TC 181 Bonita Channel, off Pt Bonita 37 49 122 32 --- -0:28 --- -2:14 0.4 0.1
TC 185 Point Bonita, 0.8 nmi NE of 37 49.25 122 30.97 -4:49 -3:54 -5:11 -4:19 0.3 0.3
TC 189 Point Bonita Lt, 0.4 nmi SSE of 37 48.72 122 31.27 -0:46 -1:06 -3:10 -1:13 0.1 0.4
TC 193 Pt Bonita/Mile Rk (midchannel) 37 48.07 122 31.13 -0:28 -0:38 -0:28 -0:51 0.7 0.8
TC 197 Mile Rock Lt., 0.2 nmi. NW of 37 47.72 122 30.68 -0:33 -0:31 -0:32 -0:51 0.8 0.8
TC 201 Point Diablo, 0.2 mile SE of 37 49 122 30 -0:07 -0:59 -1:37 -0:10 0.6 0.9
TC 205 Baker Beach , 0.3 nmi. NW of 37 47.87 122 29.31 -5:04 -4:21 -2:49 -3:10 0.4 0.3
TC 209 Fort Point, 0.3 nmi. west of 37 48.55 122 28.97 -2:08 -0:47 +0:12 +0:02 0.5 0.2
TC 213 San Francisco Bay Entrance 37 48.63 122 30.13 0:00 0:00 0:00 0:00 1.0 1.0
TC 217 Golden Gate Bridge, 0.5 mi E of 37 49.20 122 28.37 -0:20 -0:01 -0:28 -0:36 0.9 0.7
TC 221 Golden Gate Bridge, 0.8 mi E of 37 49.3 122 27.77 -0:02 +0:03 -0:05 +0:12 0.9 0.7
TC 225 Fort Point, 0.5 nmi. east of 37 48.7 122 27.98 -1:27 -2:57 -1:02 -1:39 0.2 0.4
# Slack Water time differences for places along piers.
# SAN FRANCISCO BAY, City Front TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 227 St. Francis Y.C. breakwater 37 48.5 122 26.5 -0:10 --- -1:50 --- --- ---
TC 235 Aquatic Park, 0.2 mile west of 37 48.6 122 25.7 -0:35 --- -2:05 --- --- ---
TC 243 Pier 37 37 48.6 122 24.5 -1:35 --- -2:20 --- --- ---
TC 247 Pier 29 37 48.4 122 24.0 -1:10 --- -2:20 --- --- ---
TC 263 Pier 7 37 48.0 122 23.6 -0:55 --- -2:05 --- --- ---
TC 311 Pier 14 37 47.7 122 23.3 -0:55 --- -3:00 --- --- ---
TC 315 Pier 26 37 47.4 122 23.0 -1:40 --- -1:50 --- --- ---
TC 319 Pier 38 37 47.0 122 23.0 -0:25 --- -2:25 --- --- ---
TC 323 Pier 50 37 46.4 122 22.8 -1:40 --- -2:20 --- --- ---
TC 335 Pier 70 (Bethlehem Pier No. 8) 37 45.6 122 22.7 -1:20 --- -1:55 --- --- ---
TC 343 Pier 94 (0.5 mi SE of Pier 90) 37 44.5 122 22.4 -1:50 --- -2:05 --- --- ---
TC 347 Point Avisadero 37 43.7 122 21.3 -1:25 --- -0:40 --- --- ---
TC 363 Point Avisadero, 0.8 mile S of 37 43.0 122 21.5 -1:30 --- -3:25 --- --- ---
TC 229 Alcatraz Island, 0.2 mile W of 37 50 122 26 -0:30 -0:25 -0:08 +0:12 0.8 0.6
TC 233 Alcatraz Island, southwest of 37 48.87 122 25.92 -0:50 -0:48 -1:15 -0:54 0.5 0.5
TC 241 Alcatraz Island, south of 37 49 122 25 -0:29 -0:15 -0:25 -0:29 0.5 0.6
TC 245 Blossom Rock 37 49.10 122 24.03 -0:57 -1:21 -1:13 -0:25 0.4 0.6
TC 249 Treasure Island, 0.78 mi NW of 37 50.25 122 23.38 -1:39 -1:11 -1:00 -1:55 0.4 0.3
TC 253 Treasure Island, 0.8 mi west of 37 49.3 122 23.5 -0:45 -0:49 -1:11 -0:32 0.4 0.7
TC 257 Treasure Island, 0.2 mi west of 37 49.3 122 22.7 -1:38 -1:02 -1:04 -1:01 0.5 0.6
TC 261 Yerba Buena Is., W of (midchan) 37 48.6 122 23 -0:32 -0:52 -1:06 -0:21 0.5 0.7
TC 269 Treasure Island, 0.5 mi. N of 37 50 122 22 -1:12 -0:47 -0:45 -0:36 0.4 0.4
TC 273 Treasure Island, 0.85 nmi E of 37 49.50 122 20.78 -1:57 -0:33 -0:43 -1:54 0.3 0.2
TC 277 Treasure Island, 0.3 mi. E of 37 49.6 122 21.3 -0:31 -0:36 -1:07 -0:26 0.5 0.4
TC 281 Yerba Buena Is., 0.3 nmi SE of 37 48.25 122 21.43 -1:12 -0:44 -1:00 -1:07 0.2 0.3
# SAN FRANCISCO BAY, South TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 289 Oakland Outer Harbor entrance 37 48.4 122 20.7 -1:47 -0:56 -0:45 -1:19 0.6 0.5
TC 293 Oakland Inner Harbor entrance 37 48.1 122 20.4 -1:54 -1:01 -1:08 -1:37 0.3 0.4
TC 297 Oakland Inner Harbor channel 37 47.7 122 19.1 -1:18 -1:10 -1:02 -0:57 0.2 0.2
TC 301 Oakland Inner Harbor Reach 37 47.67 122 17.15 -2:38 -0:48 -1:12 -1:40 0.1 0.1
TC 305 Oakland Harbor, Webster Street 37 48 122 16 -1:35 -1:21 -1:25 -1:31 0.3 0.3
TC 309 Oakland Harbor, High St Bridge 37 46 122 13 -1:21 -1:36 -1:25 -1:42 0.5 0.4
TC 313 7th St Terminal, 0.6 nmi SSW of 37 47.67 122 20.65 -1:44 -1:22 -1:09 -1:25 0.4 0.2
TC 317 Rincon Point, 0.57 nmi east of 37 47.42 122 22.40 -0:50 -0:44 -0:52 -0:43 0.7 0.6
TC 321 Rincon Point, midbay 37 47 122 21 -1:06 -0:45 -1:10 -0:55 0.7 0.6
TC 325 Mission Rock, 0.6 mile east of 37 46.4 122 22.1 -0:53 -0:33 -0:40 -0:25 0.9 0.7
TC 329 Mission Rock, 1.3 mile east of 37 46.5 122 21.2 -0:43 -0:43 -0:34 -0:17 0.7 0.6
TC 333 Mission Rock, 2.0 mile east of 37 46.6 122 20.3 -1:33 -1:03 -0:50 -0:51 0.6 0.7
TC 337 Potrero Point, 1.08 nmi east of 37 45.45 122 21.47 -0:52 -0:37 -0:38 -0:35 0.6 0.5
TC 341 Potrero Point, 2 miles east of 37 45 122 20 -0:52 -0:56 -0:29 -0:33 0.6 0.5
TC 345 Alameda Radar Twr, 0.9 nmi SSW 37 44.73 122 16.98 -1:39 -1:26 -1:50 -1:43 0.2 0.2
TC 349 Point Avisadero, 0.3 mile E of 37 43.8 122 20.9 -0:45 -0:39 -0:35 -0:11 0.6 0.6
TC 353 Point Avisadero, 1 mile east of 37 43.8 122 20.2 -0:47 -0:16 +0:03 +0:02 0.6 0.4
TC 357 Point Avisadero, 2 mile east of 37 43.9 122 18.8 -0:47 -0:24 -0:32 -0:15 0.5 0.5
TC 361 Point Avisadero, 0.6 nmi ESE of 37 43.38 122 19.43 -0:47 -0:43 -0:36 -0:30 0.5 0.4
TC 365 Point Avisadero, 1.25 nmi SSE 37 42.47 122 20.97 -1:00 -0:33 -0:51 -0:43 0.5 0.4
TC 369 Oakland Airport, southwest of 37 40.93 122 13.85 -1:20 -1:04 -1:01 -1:09 0.2 0.2
TC 373 Sierra Point, 1.3 miles ENE of 37 41 122 22 -1:02 -0:52 -0:47 -0:31 0.3 0.3
TC 377 Sierra Point, 1.2 nmi east of 37 40.68 122 19.05 -0:57 -0:48 -0:48 -0:13 0.3 0.2
TC 381 Oyster Point, 2.8 miles east of 37 39.9 122 19.4 -0:44 -0:38 -0:35 -0:07 0.3 0.4
TC 385 Sierra Point, 4.4 miles E of 37 40.4 122 17.7 -1:03 -0:52 -0:31 -0:24 0.3 0.2
TC 389 Point San Bruno, 0.51 nmi E of 37 39.25 122 21.83 -1:31 -0:45 -0:43 -0:58 0.2 0.1
TC 393 Mulford Gardens Chan. #2 SSW of 37 39.03 122 13.63 -1:30 -1:10 -1:12 -1:04 0.3 0.2
TC 397 Little Coyote Pt 3.4 nmi NNE of 37 37.43 122 13.88 -1:21 -1:12 -1:12 -0:52 0.2 0.2
TC 401 Little Coyote Pt 3.1 nmi ENE of 37 35.88 122 12.33 -2:07 -1:52 -1:20 -1:40 0.2 0.2
TC 405 Little Coyote Pt 1.2 nmi NE of 37 35.42 122 14.92 -0:24 -0:44 -0:33 -0:02 0.5 0.4
TC 409 San Mateo Bridge 37 35.2 122 15.2 -0:05 -0:15 +0:03 +0:24 0.5 0.4
TC 413 Redwood Pt Blair I, 1.15 mi NNE 37 33.48 122 11.93 -0:19 -0:39 -0:24 +0:03 0.5 0.4
TC 417 Dumbarton Highway Bridge 37 30.6 122 07.2 -0:12 -0:01 -0:10 +0:17 0.5 0.3
TC 421 Dumbarton Hwy Br, 0.28 mi SE of 37 30.08 122 06.93 -0:36 -0:12 -0:20 -0:28 0.5 0.4
TC 425 Dumbarton Point, 1.15 mi SE of 37 29.25 122 04.88 -0:27 -0:38 -0:10 +1:03 0.4 0.3
TC 429 Dumbarton Point, 2.25 mi SE of 37 28.5 122 04.2 -0:07 -0:24 -0:22 +1:05 0.4 0.3
# SAN FRANCISCO BAY, North TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 433 Yellow Bluff, 0.8 nmi. NE of 37 50.73 122 27.43 -0:42 -0:46 -0:59 -0:50 0.6 0.5
TC 437 Yellow Bluff, 0.8 mi. E of 37 50.1 122 27.3 -0:20 +0:04 -0:10 +0:13 1.0 0.7
TC 441 Harding Rock,0.3 nmi S of 37 49.9 122 26.6 -0:13 +0:14 +0:10 +0:13 0.8 0.8
TC 445 Alcatraz Island, 0.5 mile N of 37 50.1 122 25.2 +0:29 +0:27 -0:41 +0:02 0.6 0.7
TC 449 Pt Blunt, Angel I, 0.5 mi SW of 37 50.73 122 25.38 +0:12 -0:03 -0:29 +0:02 0.4 0.5
TC 453 Pt Blunt, Angel I, 0.25 mi S of 37 50.8 122 25.0 -0:32 -0:01 -0:08 +0:37 0.6 0.7
TC 457 Pt Blunt, Angel I, 0.8 mi SE of 37 50.7 122 24.3 --- -0:10 -0:11 -0:43 0.3 0.4
TC 461 Pt Blunt, Angel I, 0.25 mi E of 37 51.17 122 24.73 +1:01 -0:18 -0:15 +1:52 0.3 0.5
TC 465 Angel Island, off Quarry Point 37 51.8 122 24.8 +1:27 +0:10 -1:42 +1:16 0.2 0.6
TC 469 Angel Island, 0.75 mile east of 37 51.8 122 24.1 +0:46 +0:58 +1:03 +1:28 0.4 0.3
TC 473 Pt Simpson, Angel I, 1.05 nmi E 37 52.43 122 24.17 +0:09 +0:56 +0:31 +0:02 0.5 0.2
TC 477 Richardson Bay entrance 37 51.4 122 28.2 -3:45 -4:22 -3:59 -2:56 0.3 0.2
TC 481 Raccoon Strait, off Pt. Stuart 37 52 122 27 -0:33 -0:04 -0:34 -0:27 0.4 0.6
TC 485 Raccoon Strait 37 52.3 122 26.52 -0:33 -0:51 -0:50 -0:41 0.6 0.5
TC 489 Raccoon Str, off Hospital Cove 37 52.3 122 26.3 --- -0:50 -0:38 -0:29 0.5 0.5
TC 493 Bluff Point, 0.1 mile east of 37 53.0 122 26.1 +0:20 -0:38 -0:14 +0:19 0.6 0.6
TC 497 Bluff Point, 0.15 nmi. east of 37 53.23 122 24.78 +0:11 +0:34 +0:26 +0:02 0.4 0.3
TC 501 Southampton Shoal Lt, 0.2 mi E 37 53 122 24 +0:20 +0:43 +0:21 -0:06 0.3 0.3
TC 505 Point Chauncey, 1.3 mi east of 37 53.5 122 25.1 -0:03 +0:30 +0:45 +0:11 0.4 0.4
TC 509 Point Chauncey, 0.75 nmi NW of 37 54.18 122 27.53 -0:01 -0:38 +0:13 +0:02 0.4 0.3
TC 513 Point Chauncey, 1.25 nmi N of 37 54.90 122 26.87 +0:16 -0:03 +0:20 +0:14 0.6 0.5
# Lat Long Slack Flood Slack Ebb Flood Ebb
TC 517 Berkeley Yacht Hbr, 0.9 mi S of 37 51.13 122 18.67 -2:00 -1:01 -0:40 -0:58 0.1 0.1
TC 521 Olympic Circle Mark X, N of 37 52.62 122 21.53 -1:48 -1:14 -0:56 -1:18 0.2 0.1
TC 529 Point Richmond, 0.5 mi west of 37 54.3 122 24.0 -0:25 +0:09 +0:13 -0:01 0.3 0.3
TC 533 Point Richmond, 0.8 nmi NNW of 37 55.25 122 23.80 -1:57 -1:47 -1:11 -1:51 0.1 0.1
TC 537 Red Rock, east of 37 56 122 26 -0:03 +0:11 +0:31 +0:18 0.4 0.4
TC 541 Red Rock, 0.60 nmi NNE of 37 56.40 122 25.60 -0:27 -0:29 +0:13 -0:22 0.6 0.4
TC 545 Pt San Quentin, 0.82 nmi. E of 37 56.47 122 27.70 -0:18 +0:10 +0:05 -0:35 0.2 0.2
TC 549 Pt San Quentin, 1.3 nmi. E of 37 56.53 122 27.16 +0:11 +0:27 +0:38 +0:34 0.4 0.4
TC 553 Pt San Quentin, 1.9 miles E of 37 57.0 122 26.4 +0:43 +0:34 +0:31 +0:48 0.5 0.6
# San Pablo Bay,Carquinez Strait, and Suisun Bay
# Delta and Rivers
# CALIFORNIA COAST, North TIME DIFFERENCES RATIOS
# Latitude Longitude Low High
# North West Slack Flood Slack Ebb Flood Ebb
TC 757 Point Reyes <13> 38 00 123 02 -1:12 -1:12 -1:12 -1:12 0.3 0.3
TC 761 Salt Point <13> 38 34 123 21 -1:20 -1:20 -1:20 -1:20 0.3 0.3
TC 765 Point Arena <13> 38 57 123 45 -1:29 -1:29 -1:29 -1:29 0.3 0.3
TC 769 Point Cabrillo <13> 39 21 123 50 -1:38 -1:38 -1:38 -1:38 0.3 0.3
TC 773 Cape Vizcaino <13> 39 44 123 50 -1:48 -1:48 -1:48 -1:48 0.3 0.3
TC 777 Point Delgada <13> 40 00 124 04 -1:37 -1:37 -1:37 -1:37 0.3 0.3
TC 781 Punta Gorda <13> 40 15 124 22 -1:36 -1:36 -1:36 -1:36 0.3 0.3
TC 789 Table Bluff Light <13> 40 42 124 17 -1:11 -1:11 -1:11 -1:11 0.3 0.3
TC 813 Trinidad Head <13> 41 03 124 10 -0:57 -0:57 -0:57 -0:57 0.3 0.3
TC 817 Redding Rock Light <13> 41 21 124 11 -0:52 -0:52 -0:52 -0:52 0.3 0.3
TC 821 St. George Reef <13> 41 49 124 20 -0:41 -0:41 -0:41 -0:41 0.3 0.3
# OREGON COAST
TC 825 Cape Sebastian <13> 42 20 124 26 -0:26 -0:26 -0:26 -0:26 0.3 0.3
TC 829 Cape Blanco <13> 42 50 124 35 -0:10 -0:10 -0:10 -0:10 0.3 0.3
# <13> Data approximate.