Local notices to mariners Local notices to mariners
Notices to mariners cover events, local issues and infrastructure issues that may affect navigation in the Auckland region.
Local navigation aids warnings
Weekly local navigation warning summary: 12 May 2025 (PDF, 79KB)
For any enquiries, please contact harbourmaster@at.govt.nz
On this page: Local notices to mariners currently in force
- 25 – 25 Marine works, Kauri Point
- 24 – 25 Marine construction, Clarks Beach
- 23 – 25 Distress signal training, Outboard Boating Club
- 22 – 25 Weiti River temporary channel closure
- 20 – 25 Jack up barge operation, Inner Harbour
- 19– 25 Shoaling off Kawakawa Bay
- 50 – 24 Bayswater Marina fuelling pier installation work, Bayswater
- 41 – 24 Great Barrier Island temporary wharf closure Tryphena Harbour
- 03 – 24 Navigational hazard, sandbank shoaling, Whau River mouth
- 34 – 23 Marine farm development, Western Firth
- 30 - 23 O Mahurangi Penlink Weiti River bridge construction works
- 41 – 21 Great Barrier Island – no anchoring areas
- 19 – 21 Navigational hazard, sand bank shoaling, Tamaki River
- 57 – 19 Submerged pile in the approaches to Tramcar Bay Boatyard, Whangateau
- 32 – 19 Motuihe Wharf closure
- 28 – 18 Hobson Bay / Okahu Bay wave screen
- 22 – 17 Wairoa River fallen tree
- 08 – 17 Chart plotters (updated)
25 – 25 Marine works, Kauri Point
All mariners are advised that marine works are planned at the Navy wharf, Kauri Point, 0800 – 1600hrs from 12 May 2025 to 13 May 2025. The works are to be conducted under the wharf, all mariners are advised to keep minimum wakes towards the wharf while operating in the area.
*Not to be used for navigation.
Jason Son
Maritime Officer
Harbourmaster’s Office
24 – 25 Marine construction, Clarks Beach
All mariners are advised that there will be marine constructions near Clarks Beach, Waiuku from mid-May 2025 to January 2026. The works involve dredging, piling and diver operations. All mariners are advised to keep minimum wakes and additional caution while operating in the area.
*Not to be used for navigation
Jason Son
Maritime Officer
Harbourmaster’s Office
23 – 25 Distress signal training, Outboard Boating Club
All mariners are advised that a Distress Signal Training will be undertaking at 7 Tamaki Drive,
Outboard Boating Club, between 1830 hrs and 2030 hrs on 13 May 2025.
Distress signals to be used as the below:
| Number | Description |
| 30 | Handheld red distress flares |
| 2 | Orange smoke distress flares |
*Not to be used for navigation
Jason Son
Maritime Officer
Harbourmaster’s Office
22 – 25 Weiti River temporary channel closure
All mariners are advised that there will be temporary river closures as a part of O Mahurangi – PENLINK project at Weiti River. Details of schedule and locations are below in the map.
All mariners operating in this area, refer to the below message from the project team.
Wēiti River channel temporary closures
Dear Neighbours
The project will be carrying out short term temporary closures of the Wēiti River navigable channel to allow three large concrete pours to happen. This is part of the Pier 4 pile cap construction on the eastern side of the river and ensures the safe and continuous of supply of concrete. During the first closure, the team will also extend the boom of a crane.
The temporary bridge will be lifted into position the afternoon prior to the pour and removed in the morning following the pour.
When are we doing this?
| Closure | Date and time |
| Closure 1 | From 5pm Tuesday 13 May to 9am Thursday 15 May |
| Closure 2 (contingency) | From 5pm Tuesday 20 May to 9am Thursday 22 May |
| Closure 3* | From 5pm Monday 16 June to 9am Wednesday 18 June |
| Closure 4* | From 5pm Monday 7 July to 9am Wednesday 9 July |
*Dates to be confirmed closer to date
Should there be any changes to the above dates due to unforeseen circumstances or the works are either delayed or completed earlier than expected, a notification will be sent via email.
Please see the next page for a map of the affected area as the channel closure does not affect vessels navigating the river downstream of the worksite.
We apologise for any inconvenience caused and thank all river users and neighbours for their patience during the ongoing construction of the new Wēiti River Bridge. Should you have any questions in regard to these works, please don’t hesitate to contact me.
Ngā mihi nui
Trish Viall
Stakeholder and Community Engagement Manager
Mobile: 027 548 7474 Freephone: 0800 736 5465
Email: trish.viall@fultonhogan.com
For information on the O Mahurangi project, visit www.nzta.govt.nz/penlink
Jason Son
Maritime Officer
Harbourmaster’s Office
20 – 25 Jack up barge operation, Inner Harbour
All mariners are advised that there are jack up barge operations at Inner Harbour in the vicinity of the Harbour bridge. The barge will relocate its position with progress and the area is highlighted in the below map. All mariners are advised to navigate with caution and avoid creating unnecessary wakes towards the barge while operating in the area.
* Not to be used for navigation.
Jason Son
Maritime Officer
Harbourmaster’s Office
19– 25 Shoaling off Kawakawa Bay
Shoaling has been observered in the vicinity of the drying bank to the south of Karamuramu Island.
The shoaling appears to be particularly severe to the south and west of the South Cardinal beacon where depths are significantly less than those charted.
All mariners are advised to navigate with extreme caution while operating in this area.
*Not to be used for navigation
Andrew Hayton
Harbourmaster’s Office
50 – 24 Bayswater Marina fuelling pier installation work, Bayswater
Bayswater Marina Fuelling Pier is closed to the public while we install fuel pumps and equipment on the pier.
The above works have started. Work is now not expected to finish by Friday 31 January 2025.
All vessels are requested to keep wake to a minimum and approach the Bayswater Marina facility with caution.
*Not to be used for navigation
Bruce Goff
Maritime Officer
Harbourmaster’s Office
41 – 24 Great Barrier Island temporary wharf closure Tryphena Harbour
Auckland Transport's wharf structure at Tryphena Harbour on Great Barrier Island will be closed to the public until May 2025. The wharf is closing while the marine contractor STF Limited undertakes wharf maintenance work.
All vessels are requested to keep clear of the wharf structure. You must keep your wake to a minimum when transiting the area.
*Not to be used for navigation
Bruce Goff
Maritime Officer
Harbourmaster’s Office
03 – 24 Navigational Hazard, sandbank shoaling, Whau River mouth
All mariners are advised that there is shoaling on the western side of the channel,
near the Whau River Mouth. The location is identified with yellow, as below.
All mariners are advised to navigate with caution while operating in this area.
*Not to be used for navigation.
Christiaan Moss
Deputy Harbourmaster
Harbourmaster’s Office
34 – 23 Marine farm development, Western Firth
All mariners are advised that there will be marine farm development at Western Firth from 9 November 2023. The development includes the installation of navigation aids, mussel lines, and others. The site is located in YELLOW on the map below. All mariners are advised to navigate with caution while operating in this area.
*Not to be used for navigation
Jason Son
Maritime Officer
Harbourmaster’s Office
30 - 23 O Mahurangi Penlink Weiti River bridge construction works
All mariners are advised that construction of the O Mahurangi Penlink River Bridge will commence mid-September 2023 with the installation of temporary platforms built on the western and eastern banks of the Weiti River to facilitate the construction of the permanent Weiti River bridge. Work will involve pile drilling, vibing and hammering into the seabed.
A barge will operate between the two staging platforms providing materials to the work sites through to December 2026.
Passage through the Weiti River Bridge Construction Zone will remain open to mariners, however Weiti River closures are expected during the finally stages of the project build. All river closures will be notified prior to the planned works. Mariners are requested to keep wake to a minimum when transiting through the bridge construction zone for the safety of construction staff.
*Not to be used for navigation.
Bruce Goff
Maritime Officer
Harbourmaster’s Office
Notice: 41 – 21 Great Barrier Island – no anchoring areas
This notice replaces previous Local Notice to Mariners 39 – 21.
All mariners are advised that there are three no anchoring/closed areas on Great Barrier Island. The no anchoring areas are: Blind Bay, Whangaparapara and Tryphena Harbours. You can anchor with a permit from MPI, but not for any other reason.
There is guidance on the MPI page.
Please contact Ministry of Primary Industries for further details Ministry for Primary Industries.
*Not to be used for navigation.
Jason Son
Maritime Officer
Notice: 19 - 21 Navigational hazard, sandbank shoaling, Tamaki River
All mariners are advised that a sandbank, which is North of the No.15 marker in Tamaki River, is shoaling due to sand-building. Locations are identified as per below and the depth in the vicinity could be lower than charted depth.
All mariners are to navigate with additional caution while operating in this area.
*Not to be used for navigation.
Jason Son
Maritime Officer
Harbourmaster’s Office
57 - 19 Submerged pile in the approaches to Tramcar Bay Boatyard, Whangateau
The Harbourmaster has received reports of a submerged pile in the approaches to Tramcar Bay boat yard in the waters between Whangateau Harbour and Tramcar Bay.
All mariners are advised to navigate with extreme caution when operating in this area.
Not to be used for navigation.
Pulasthi Ranasinghe
Maritime Officer
32 - 19 Motuihe Wharf closure
All mariners are advised that the Department of Conservation has closed the Motuihe wharf due to public safety, the wharf will remain closed until further notice.
The Department is working closely with engineers to look at options available to remedy issues and re-open the wharf as soon as practicable.
The Department apologises for any inconvenience and will continue to keep the public informed as they seek solutions.
Updates will be provided on the DOC website and should you require further information, please contact the DOC hotline on 0800 362 468.
Map not to be used for navigation.
Pulasthi Ranasinghe
Maritime Officer
28 - 18 Hobson Bay/Okahu Bay wave screen
All mariners are advised to navigate with caution in the vicinity of the Hobson Bay/Okahu Bay derelict wave screen. Mariners are reminded that they should only navigate through the recognised entry/exit (as per chart NZ 5322).
Map not to be used for navigation.
Christiaan Moss
Deputy Harbourmaster
22 - 17: Wairoa River, fallen tree (upper reaches), 20 July 2017
All Mariners are advised that a large tree has fallen into the upper reaches of the Wairoa River, potentially impeding navigation.
GPS coordinates:
- Latitude 36°58’840
- Longitude 175°02’655
All mariners are advised to navigate with extreme caution in this area.
The map is not to be used for navigation.
Bruce Goff
Maritime Officer
08 - 17: Chart plotters - updated 14 March 2017
All mariners are reminded that electronic chart plotters are to be used as an aid to navigation and paper charts should be updated and consulted.
Electronic raster charts used on some plotters may not incorporate the latest chart corrections.
Mariners are reminded to use up to date charts for navigation and advised to contact their plotter supplier if in doubt.
Harbourmaster’s Office
Some images on this page are based on/include LINZ’s data which are licensed by Land Information New Zealand (LINZ) for re-use under the Creative Commons Attribution 4.0 International license.
Pest warning: Mediterranean fanworm
The Mediterranean fanworm is a pest that has been spotted in the Waitematā Harbour/inner Hauraki Gulf, as well as the Whangarei Harbour and Lyttleton Port.
Keep your boat's hull clean to reduce the risk of this pest clinging and causing damage to our marine life.
Marine biosecurity information: new rules and regulations
Marine pests spread easily through ballast water and hull fouling, including Mediterranean fanworm (Sabella Spallanzani) and Clubbed tunicate (Styela clava). Check to ensure your hull is clean and be aware of other regions rules before leaving Auckland.
Visit marinepests.nz for more information and to check marine biosecurity rules and regulations for different regions in the northern North Island.
Read further information on marine pests (PDF 334KB)
Weather information
For up-to-date weather information, visit:
- the MetService website
- the Coastguard NowCasting weather information VHF channels.