Australian Hydrographic Service
AUSTRALIAN HYDROGRAPHIC SERVICE
Australian Hydrographic Service Australian Hydrographic Service
Australian Hydrographic Service Home About Us Contact Information Feedback Help Search
Australian Hydrographic Service
Important Information
Notices to Mariners
Australian Chart Index
Products & Services
Prices
Distribution Network
Hydrographic Data
Business Publications
Tools

Downloads & Demonstrations
Related Sites
Careers in Hydrography
Glossary
FAQ's

Lunitidal Intervals

The lunitidal interval is defined as the time interval between the transit of the Moon over the local or Greenwich meridian and the next local high water or low water. It can be described as local or Greenwich, depending on the transit reference meridian; assumed to be local unless otherwise specified.

Lunitidal intervals can only be used to estimate the tides at places where the semidiurnal component of the tide is dominant.

The lunitidal interval changes through the lunar phase cycle. The variation about the mean is approximately +/- 30 minutes.

Please Note:

Lunitidal interval are considered obsolete and should not be used for navigation or any other critical purpose.

Users are advised that standard port predictions are available at www.bom.gov.au/oceanography/.

The State Authorities produce their own Official Tide Tables with time differences for secondary ports.

Australian National Tide Tables and Seafarer Tides provides National coverage. Automatic Tidal predictions for Secondary ports are available with Seafarer Tides.

Further information about lunitidal intervals refer to www.akueck.de/tiden.htm*

*The content found by using this link is not created, controlled or approved by this department. No responsibility is taken for the consequences of viewing content on this site.

All locations listed in the Australian National Tide Tables 2005 edition are listed below.

Port #
Port Name
Latitude
Longitude
Time Zone
Local Lunitidal Interval
(South)
(East)
Hours
Minutes
20080 MAWSON 67 36 62 52 -600 0 -8
20090 HEARD I. 53 1 73 23 -500 11 30
20100 DAVIS 68 34 77 58 -700 0 -4
20120 CASEY 66 16 110 31 -800 0 -10
20130 PORT MARTIN 66 50 141 25 -1000 11 14
20140 COMMONWEALTH BAY 67 0 142 40 -1000 10 47
20180 ROSS I. 77 52 166 48 -1000 12 22
46280 COCOS I. 12 7 96 53 -630 4 59
46290 CHRISTMAS I. 10 24 105 43 -700 7 20
54150 SUAI 9 21 125 16 -900 0 -35
54172 COM (KUN) 8 22 127 4 -900 0 60
54178 KARABELA 8 29 126 16 -900 0 -12
54179 HERA 8 32 125 41 -900 0 -10
54180 DILI 8 34 125 33 -900 0 -2
54181 OECUSSI 9 11 124 24 -900 11 34
55420 MERAUKE 8 32 140 20 -1000 1 1
55430 TURU CAY 9 49 141 25 -1000 3 44
55434 BOIGU I. 9 13 142 13 -1000 5 17
55440 DARU 9 4 143 12 -1000 10 49
55445 BRISTOW I. 9 6 143 17 -1000 10 42
55470 UMUDA I. 8 30 143 47 -1000 10 38
55480 GOARIBARI I. 7 45 144 12 -1000 10 46
55481 URAMU I. 7 40 144 38 -1000 10 32
55490 OMATI 7 25 143 57 -1000 0 22
55510 KIKORI 7 25 144 15 -1000 0 -19
55515 KUMUL TKR MRG 8 4 144 34 -1000 9 53
55520 PORT ROMILLY 7 41 144 49 -1000 10 23
55540 KEREMA 7 58 145 45 -1000 9 47
55580 PORT MORESBY 9 29 147 8 -1000 9 27
55581 BOOTLESS INLET 9 30 147 15 -1000 9 8
55600 KALIGOLA POINT 10 9 148 16 -1000 9 20
55610 DEDELE POINT 10 14 148 44 -1000 9 23
55615 MARGARIDA 10 20 149 20 -1000 9 26
55620 BONARUA I. 10 24 149 21 -1000 9 26
55630 DELAMI I 10 32 149 49 -1000 9 28
55633 AVA POINT 10 38 149 48 -1000 10 1
55650 BRUMER I. 10 46 150 22 -1000 9 35
55655 BAIIRI I. 10 54 150 43 -1000 9 30
55659 DOINI I. 10 42 150 42 -1000 9 42
55660 SAMARAI I. 10 37 150 40 -1000 10 1
55669 BENTLEY I. 10 43 151 15 -1000 10 12
55670 BASILAKI, PITT BAY 10 31 151 8 -1000 10 59
55671 SHORTLAND I. 10 32 151 5 -1000 10 30
55672 HUMMOCK I. 10 35 151 22 -1000 9 50
55673 KEGAWAM I. 10 21 151 23 -1000 10 17
55675 BLAKENEY I. 10 25 151 13 -1000 11 49
55690 MISIMA 10 42 152 47 -1000 10 54
55710 DUCHATEAU I. 11 17 152 22 -1000 9 24
55750 HATI LAWI HARBOUR 11 16 153 10 -1000 9 52
55780 CAPE DELIVERANCE 11 24 154 17 -1000 10 4
55830 ALOTAU 10 19 150 27 -1000 10 33
55832 MAPAMOIWA 9 37 150 26 -1000 11 59
55840 NUAKATA I. 10 17 151 0 -1000 10 43
55850 EAST CAPE 10 15 150 52 -1000 12 10
55870 WOODLARK I. 9 15 152 58 -1000 11 14
55871 SHARP I. 9 19 152 31 -1000 8 25
55910 AIGURA POINT 10 8 150 15 -1000 6 6
55940 TUFI HARBOUR 9 5 149 19 -1000 2 33
55951 ORO BAY 8 53 148 29 -1000 2 57
55954 EVE SHOAL 8 31 148 25 -1000 3 6
55956 CAUTION POINT 8 17 148 12 -1000 2 45
55960 KANAPU I. 8 20 150 7 -1000 3 21
55980 LAE 6 45 147 0 -1000 2 49
55990 DREGER HARBOUR 6 39 147 53 -1000 2 44
56000 FINSCH HARBOUR 6 33 147 51 -1000 2 27
56020 UMBOI I. 5 42 148 5 -1000 6 19
56030 MADANG HARBOUR 5 13 145 48 -1000 6 57
56050 BOGIA 4 17 144 58 -1000 7 7
56060 SEPIK R. 3 53 144 36 -1000 7 15
56070 WEWAK 3 33 143 38 -1000 7 11
56100 VANIMO 2 41 141 18 -1000 6 42
56120 STONE I. 2 15 146 33 -1000 7 18
56130 SEEADLER HARBOUR 2 2 147 22 -1000 7 13
56175 ELEONORA BAY 5 32 149 43 -1000 5 18
56180 KIMBE 5 31 150 6 -1000 7 41
56200 RABAUL 4 12 152 11 -1000 6 5
56202 FOUL BAY 4 10 152 25 -1000 6 59
56210 KOKOPO 4 21 152 17 -1000 6 12
56240 KAVIENG 2 35 150 48 -1000 2 60
56300 AMBITLE I. 4 6 153 35 -1000 2 58
56330 SOROKEN 5 34 154 43 -1000 2 29
56338 TOROKINA 6 16 155 2 -1000 3 27
56340 ANEWA BAY 6 11 155 33 -1000 2 54
56341 EVERENTA I. 6 49 155 49 -1000 2 41
56350 KIETA HARBOUR 6 13 155 38 -1000 2 53
56362 KATURASELE 7 12 156 54 -1100 2 11
56380 VAGHENA I. 7 28 157 44 -1100 1 41
56460 GIZO ANCHORAGE 8 6 156 51 -1100 0 1
56470 BLACKETT STRAIT 8 8 157 8 -1100 0 16
56480 MUNDA POINT 8 21 157 17 -1100 2 52
56490 VIRU 8 30 157 44 -1100 2 48
56510 MAROVO LAGOON 8 30 157 58 -1100 3 9
56520 MONGO PASSAGE 8 21 157 52 -1100 2 56
56540 LOLOMO PASSAGE 8 11 157 41 -1100 3 18
56670 HONIARA 9 25 159 58 -1100 3 52
56690 NUGHU I. 9 17 160 21 -1100 3 0
56710 MBUNGANA I. 9 11 160 13 -1100 3 8
56748 BUENA VISTA 8 54 160 1 -1100 4 8
56750 SANDFLY PASSAGE 8 58 160 5 -1100 3 44
56780 THOUSAND SHIPS BAY 8 26 159 42 -1100 3 39
56910 BINA HARBOUR 8 55 160 46 -1100 3 35
57700 NORFOLK I. 29 4 167 56 -1130 8 8
57715 ELIZABETH REEF 29 55 159 4 -1000 8 24
57720 LORD HOWE I. 31 31 159 4 -1030 8 48
57750 CATO I. 23 15 155 32 -1000 8 32
57770 SAUMAREZ REEF 21 55 153 33 -1000 8 30
57810 MARION REEF 19 6 152 24 -1000 9 8
57820 MELLISH REEF 17 25 155 52 -1000 8 51
57840 EAST DIAMOND I. 17 26 151 4 -1000 9 5
57850 WILLIS I. 16 13 150 1 -1000 9 15
57930 BRAMBLE CAY 9 8 143 53 -1000 9 58
57932 UNNAMED CAY 9 21 143 20 -1000 10 25
57935 STEPHENS I. 9 30 143 33 -1000 10 23
57940 DARNLEY I. 9 34 143 46 -1000 10 13
57945 EAST CAY 9 23 144 13 -1000 9 42
57980 RENNEL I. 9 45 143 16 -1000 9 39
57987 MAER I. 9 54 144 2 -1000 9 44
57988 ASHMORE REEF (QLD) 10 5 144 30 -1000 9 15
57990 AUREED I. 9 57 143 17 -1000 10 45
58000 DUNGENESS REEF 9 58 142 58 -1000 11 1
58010 ZAGAI I. 9 52 142 54 -1000 11 45
58015 YAM I. 9 54 142 46 -1000 0 -23
58020 SAIBAI I. 9 23 142 37 -1000 0 33
58023 WARRIOR REEF 9 35 143 9 -1000 10 31
58025 PHIPI REEF 9 36 142 32 -1000 0 14
58030 GABBA I. 9 46 142 37 -1000 0 0
58035 TALAB ISLAND 9 58 142 13 -1000 1 30
58070 COCONUT I. 10 3 143 4 -1000 11 5
58072 DUGONG I. 10 31 143 6 -1000 10 58
58073 POLL I. 10 15 142 49 -1000 11 31
58075 KIRKCALDIE REEF 10 25 142 48 -1000 11 8
58080 SUARJI I. 10 10 142 31 -1000 0 -6
58090 HAWKESBURY I. 10 23 142 8 -1000 3 57
58099 ALERT PATCHES 10 29 142 21 -1000 0 6
58100 TWIN I. 10 28 142 26 -1000 0 -6
58110 EAST STRAIT I. 10 30 142 27 -1000 0 0
58131 MOA I. 10 14 142 13 -1000 3 11
58140 INCE POINT 10 30 142 19 -1000 0 55
58170 THURSDAY I. 10 35 142 13 -1000 1 43
58180 TURTLE HEAD 10 31 142 13 -1000 2 56
58190 ROUND I. 10 33 142 12 -1000 3 31
58200 GOODS I. 10 34 142 10 -1000 4 3
58230 BOOBY I. 10 36 141 55 -1000 3 58
58232 VARZIN SHOAL 10 33 141 55 -1000 4 1
58240 PROUDFOOT SHOAL 10 31 141 28 -1000 3 36
58241 WHITE ROCKS 10 31 142 1 -1000 3 59
58242 CARPENTARIA 10 44 141 18 -1000 3 15
58260 PAPOU POINT 10 37 142 20 -1000 0 11
58280 BAMPFIELD HEAD 10 42 142 6 -1000 3 60
58281 CRAB I. 10 58 142 7 -1000 3 59
58283 RED WALLIS I. 10 51 142 2 -1000 3 49
58300 TARILAG I. 10 45 142 14 -1000 3 26
58330 HARRINGTON REEF 10 49 142 43 -1000 11 6
58340 HERALD CAMP 10 56 142 9 -1000 3 49
58360 RED I. 10 51 142 22 -1000 2 52
58390 POSSESSION I. 10 44 142 24 -1000 1 7
58430 ALPHA ROCK 10 38 142 32 -1000 0 -22
58470 ALBANY I. 10 43 142 35 -1000 11 38
58485 TRIANGLE REEF 10 45 143 59 -1000 9 59
58490 TURTLE HEAD I. 10 55 142 42 -1000 10 46
58539 MACLENNAN CAY 11 19 143 48 -1000 9 48
58540 RAINE I. 11 36 144 3 -1000 9 12
58561 MCSWEENY REEF 11 1 143 14 -1000 10 29
58570 CAIRNCROSS I. 11 15 142 55 -1000 9 35
58590 HANNIBAL I. 11 36 142 56 -1000 10 9
58600 SHELBURNE BAY 11 54 143 6 -1000 10 15
58610 CAPE GRENVILLE 11 58 143 16 -1000 9 59
58615 HICKS I. 11 59 143 17 -1000 9 43
58630 SIR CHARLES HARDY 11 55 143 26 -1000 9 44
58650 PIPER I. 12 15 143 14 -1000 9 35
58660 PORTLAND ROAD 12 36 143 25 -1000 9 26
58670 RESTORATION I. 12 38 143 27 -1000 9 32
58680 CHAPMAN I. 12 53 143 36 -1000 9 25
58690 HAM REEF 13 2 143 52 -1000 9 17
58700 JUBILEE REEF 13 10 143 46 -1000 9 22
58710 NIGHT I. 13 10 143 34 -1000 9 22
58720 UNNAMED REEF No. 3 13 20 143 58 -1000 9 21
58730 MORRIS I. 13 29 143 43 -1000 9 23
58735 1st 3 MILE OPENING 13 29 144 3 -1000 9 10
58740 CREECH REEF 13 38 144 5 -1000 9 23
58750 FIFE I. 13 39 143 43 -1000 9 24
58761 PELICAN I. 13 55 143 50 -1000 9 26
58800 FLINDERS I. 14 11 144 14 -1000 9 32
58820 PIPON I. 14 7 144 30 -1000 9 18
58830 CAPE MELVILLE 14 10 144 29 -1000 9 22
58840 MUNRO REEF 14 18 144 43 -1000 9 21
58865 LEGGATT I. 14 32 144 51 -1000 9 23
58870 NORMANBY R. 14 26 144 9 -1000 9 27
58885 CARTER REEF 14 34 145 36 -1000 9 21
58890 LIZARD I.(QLD) 14 39 145 27 -1000 9 13
58894 E. PETHERBRIDGE I. 14 44 145 6 -1000 9 27
58896 N. DIRECTION I. 14 45 145 30 -1000 9 25
58900 CAPE FLATTERY 14 57 145 19 -1000 9 13
58903 RIBBON REEF NO. 9 14 59