About This Outlook
As part of our ongoing commitment to supporting mariners and helping stakeholders monitor significant weather conditions, Weathernews has been providing regular port weather highlights across the Arabian Sea and Indian Ocean during the Southwest Monsoon. With the monsoon season now winding down in these regions, we are shifting our focus to the North Pacific and North Atlantic — two key regions where developing weather systems and adverse sea conditions can significantly impact maritime operations.
This week’s outlook highlights notable weather systems and areas of concern across both regions, helping ship operators and other stakeholders anticipate potential challenges to maritime operations.
North Pacific Ocean
Weathernews Maritime Forecaster comment:
An upper-level trough will remain stalled near the Gulf of Alaska this week, bringing periods of rough weather across a broad area of the North Pacific.
As of November 9, two well-developed low-pressure systems are located south of the Gulf of Alaska and south of the Aleutian Islands. Rough seas and stormy conditions are spreading across the region, particularly between these systems and the high-pressure area to the south.
The low-pressure system near the Gulf of Alaska is expected to move northward through November 10, while the system south of the Aleutian Islands will track eastward through November 12. Both systems are expected to generate high waves exceeding 6 meters.
Around November 11, another low-pressure system is forecast to develop south of the Aleutian Islands before moving toward the Gulf of Alaska in the second half of the week. This system is expected to bring severe sea conditions across a wide area of the mid- to high-latitude North Pacific.
Typhoon No. 32 (CEMPAKA) is forecast to turn northeastward over waters south of Japan and transition into an extratropical cyclone near the Ogasawara Islands around November 11. Even after becoming an extratropical cyclone, the system may continue to bring strong winds and high waves to surrounding areas, so caution is advised.
Meanwhile, northeasterly seasonal winds have strengthened over the East China Sea and South China Sea under the influence of Typhoon No. 32 and high pressure over the Asian continent. Waves of 4 to 5 meters are expected in these areas through around November 11.
Surface pressure, wind and wave patterns over the North Pacific Ocean, valid November 9, 2026, 06:00UTC
■ Key heavy weather areas:
- Nov 9–15: Broad area from south of the Aleutian Islands to the west coast of North America: Multiple intense low-pressure systems
- Nov 9–11: Near the Ogasawara Islands: Typhoon No. 32 (CEMPAKA)
- Nov 9–11: South China Sea and East China Sea: Strengthening northeasterly monsoon
North Atlantic Ocean
Weathernews Maritime Forecaster comment:
A low-pressure system accompanied by cold air aloft will remain nearly stationary near the Azores. Through around November 10, high waves exceeding 6 meters are expected to persist offshore west of the Iberian Peninsula.
From November 12 to 13, a low-pressure system moving from inland North America toward the East Coast is expected to intensify. During the second half of the week, waves of 5 to 6 meters are expected along the North American East Coast, and caution is advised.
Surface pressure, wind and wave patterns over the North Atlantic Ocean, valid November 9, 2026, 06:00UTC
■ Key heavy weather areas:
- Nov 9–10: Near the Azores: Intense low-pressure system
- Nov 13–15: North American East Coast: Developing low-pressure system
Disclaimer: This outlook is provided for informational purposes only; our actionable, ship-specific advisories are exclusively available through our paid maritime solutions. Weathernews Inc. assumes no liability for navigational decisions, losses, or damages resulting from reliance on this general overview.
