Upcoming Deadlines

Range 30 days 3 months 6 months 12 months
Source EU Federal (DE) Schleswig-Holstein Mecklenburg-Vorpommern Lower Saxony Foundation Private US Foundation UK Nordic UN / Multilateral Corporate Impact Investor Philanthropic Network International
Relevance ≥70% ≥50% ≥30%
Topic Aquaculture Biodiversity Blue Economy Capacity Building Circular Economy Climate Coastal Protection Coral Reefs Education Fisheries Marine Conservation Marine Protected Areas Plastic Waste Pollution Recycling & Upcycling Research Seaweed & Algae Waste Management
Mechanism Accelerator Blended Finance Grant Investment Loan / Concessional Finance Prize Technical Assistance
Region Africa Arctic Baltic Sea Global India Mediterranean Nordic / Denmark North Sea Southeast Asia
Audience For Communities / Cooperatives For NGOs For Researchers For Startups
Funder-type Corporate Family Office Foundation Government Impact Investor Multilateral Philanthropic Network Research Council
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3 fixed deadlines, 37 rolling/open

March 2026

31.03. 11d left
Caribbean BluEFin Project (CBF) · Caribbean Biodiversity Fund (CBF) — Caribbean BluEFin Project · USD 200,000–250,000 per project; co-financing in cash and/or in-kind is highly encouraged
For NGOs Foundation Grant Aquaculture Biodiversity Blue Economy Circular Economy Coral Reefs Fisheries Marine Conservation
31.03. 11d left
Save Our Seas Foundation - Keystone Grants · Save Our Seas Foundation (SOSF) · USD 10,000–100,000 per year; average USD 25,000 per annum. Biennial cycle, up to 3 years total duration with annual continuation applications possible.
For NGOs For Researchers Foundation Grant Global Biodiversity Education Marine Conservation Research

April 2026

12.04. 23d left
National Geographic Society Grants - Ocean Exploration & Discovery · National Geographic Society · Level I grants up to USD $20,000; Level II grants up to $100,000
Foundation Grant Global Education Marine Conservation Plastic Waste Research

Rolling / Open Deadlines

periodic
The Earthshot Prize · The Prince of Wales Charitable Fund (Earthshot Prize) · 2026 nominations largely closed (most nominators had Oct-Dec 2025 deadlines). 2027 cycle expected to open mid-2026.
Climate Marine Conservation Plastic Waste Pollution
periodic
OCEAN Grant Programme UK - Marine Community Grants · UK FCDO / Defra (Blue Planet Fund) · 2026-Q2
For Communities / Cooperatives For NGOs Government Grant Africa India Southeast Asia Blue Economy Marine Conservation Plastic Waste Waste Management
periodic
Oceanic Society - Expedition Impact Program Conservation Grants · Oceanic Society · Annual, Spring deadline: February 1 (awards announced March 15); Fall deadline: August 1 (awards announced September 15). Rolling consideration for time-sensitive opportunities from active expedition partners.
For NGOs Foundation Grant Global Biodiversity Marine Conservation Plastic Waste
periodic
Pew Fellows Program in Marine Conservation · The Pew Charitable Trusts · Annual, typically announced in March
For Researchers Foundation Grant Global Biodiversity Coral Reefs Fisheries Marine Conservation Marine Protected Areas Research
periodic
Mesoamerican Reef Fund (MAR Fund) · MAR Fund (Mesoamerican Reef Fund) · Annual, typically mid-year (18th RFP deadline was September 9, 2025)
For NGOs For Researchers Foundation Grant Biodiversity Coral Reefs Fisheries Marine Conservation Marine Protected Areas
periodic
UNDP Equator Initiative - Equator Prize · United Nations Development Programme (UNDP) - Equator Initiative · Annual, typically with nominations open in early-mid year and award ceremony in December
For Communities / Cooperatives Multilateral Prize Global Biodiversity Capacity Building Climate Marine Conservation
periodic
Whitley Fund for Nature (Whitley Awards) · Whitley Fund for Nature (WFN) · Annual. 2026 applications now closed. Typically opens mid-year for following year awards ceremony in May.
For NGOs Foundation Grant Prize Global Biodiversity Coastal Protection Marine Conservation Marine Protected Areas
periodic
Rolex Awards for Enterprise · Rolex · Biennial, applications typically open every two years. Last cycle: 2023 laureates selected. Next round not yet announced.
Corporate Prize Global Biodiversity Climate Marine Conservation
periodic
Norway Development Assistance Program Against Marine Litter - SDG Partnership · Government of Norway (Norad — Norwegian Agency for Development Cooperation) · Call for proposals Stage 1 (concept notes) deadline: September 2025 (first phase of new programme); monitor norad.no for 2026 calls
For NGOs Government Grant Africa Global Southeast Asia Blue Economy Capacity Building Circular Economy Marine Conservation Plastic Waste Pollution Recycling & Upcycling Waste Management
Rolling
Vancouver Aquarium Ocean.org - Ocean Action Grants · Ocean Wise (ocean.org) / Canada Service Corps · December 4, 2026 (final report deadline; applications accepted on rolling basis)
For Communities / Cooperatives Foundation Grant Capacity Building Education Marine Conservation Plastic Waste
periodic
Save Our Seas Foundation - Funding Guidelines · Save Our Seas Foundation (SOSF) · Keystone Grants Stage I opens March-April 2026; Small Grants Stage I opens May 2026; applications are currently closed
For Researchers Foundation Grant Global Biodiversity Education Marine Conservation Research
Rolling
SIDA Sweden Environmental and Climate Programs · Sida – Swedish International Development Cooperation Agency · Next large CSO grant call planned for 2027
For NGOs For Researchers Government Grant Technical Assistance Africa Global Southeast Asia Capacity Building Circular Economy Climate Marine Conservation Plastic Waste Pollution Waste Management
periodic
Pew Marine Fellows Program · The Pew Charitable Trusts · Periodic (annual cycle, nomination-based; no open call)
For Researchers Foundation Grant Global Biodiversity Marine Conservation Research
periodic
StartBlue Ocean Enterprise Accelerator (VentureWell/Scripps) · VentureWell / NOAA IOOS · Periodic, Spring and Fall cohorts annually (Spring 2026 Stage 0 deadline: April 7, 2026)
For Researchers For Startups Foundation Accelerator Grant Aquaculture Blue Economy Marine Conservation
periodic
Blue Action Fund Grant Programme · Blue Action Fund · Periodic, per Call for Proposals (currently no open or upcoming calls)
For NGOs Foundation Grant Africa Global Southeast Asia Biodiversity Coastal Protection Fisheries Marine Conservation Marine Protected Areas
periodic
Rolex Awards for Enterprise - Environment and Exploration · Rolex (Rolex Perpetual Planet Initiative) · Periodic, typically every two years. Most recent cycle: 2023 laureates. Next cycle expected circa 2025-2026.
Corporate Prize Global Biodiversity Marine Conservation Research
periodic
Schmidt Marine Technology Partners · Schmidt Marine Technology Partners (Schmidt Family Foundation) · Portal closed for 2025. Reopening early 2026 — check schmidtmarine.secure-platform.com
For NGOs For Researchers For Startups Foundation Grant Global Blue Economy Marine Conservation Pollution Research
periodic
Baltic Sea Neighbourhood Programme (BSNP) - Swedish Institute · Swedish Institute (Svenska institutet) · Programme currently closed; new consolidated programme launching March 2026
For NGOs For Researchers Government Grant Baltic Sea Nordic / Denmark Biodiversity Blue Economy Capacity Building Circular Economy Climate Coastal Protection Marine Conservation Pollution Research Waste Management
periodic
KfW Development Bank Marine Litter Reduction Initiative · KfW Development Bank (on behalf of the German Federal Government), channelled through Caribbean Biodiversity Fund (CBF) · Programme runs until 2028; individual sub-grant deadlines managed by Caribbean Biodiversity Fund
For NGOs Government Multilateral Grant Global Biodiversity Blue Economy Capacity Building Circular Economy Education Marine Conservation Plastic Waste Pollution Recycling & Upcycling Waste Management
Rolling
Global EbA Fund - Ecosystem-based Adaptation for Climate Resilience · Global EbA Fund (Implemented by IUCN and UNEP; funded by German Federal Ministry BMUKN via IKI) · Rolling basis
For NGOs Multilateral Grant Global Biodiversity Capacity Building Climate Coastal Protection Marine Conservation
Rolling
World Bank PROBLUE Ocean Trust Fund · World Bank (PROBLUE — Multi-Donor Trust Fund) · Rolling basis
Multilateral Blended Finance Grant Technical Assistance Global Aquaculture Blue Economy Capacity Building Climate Coastal Protection Fisheries Marine Conservation Marine Protected Areas Plastic Waste Pollution
Rolling
MAR+Invest (MAR Fund) · MAR Fund / Global Fund for Coral Reefs (GFCR) · Rolling basis
Foundation Multilateral Blended Finance Climate Coastal Protection Coral Reefs Marine Conservation Marine Protected Areas
Rolling
Adaptation Fund - SIDS Marine Projects · Adaptation Fund · Rolling basis
Multilateral Grant Technical Assistance Africa Global Southeast Asia Biodiversity Capacity Building Climate Coastal Protection Marine Conservation
Rolling
Mangroves for the Future (MFF) Initiative · Mangroves for the Future (MFF) / IUCN / UNDP · Rolling basis
For Communities / Cooperatives For NGOs Multilateral Grant India Southeast Asia Biodiversity Capacity Building Coastal Protection Fisheries Marine Conservation Marine Protected Areas
Rolling
Schmidt Ocean Institute - Research Vessel & Grant Program · Schmidt Ocean Institute · Rolling basis
For Researchers Foundation Grant Technical Assistance Global Blue Economy Marine Conservation Research
Rolling
Lloyds Register Foundation - Ocean Safety Grants · Lloyd's Register Foundation · Rolling basis
For NGOs For Researchers Foundation Grant Africa Global India Southeast Asia Blue Economy Capacity Building Climate Education Fisheries Marine Conservation Research
Rolling
New England Aquarium - Marine Conservation Action Fund (MCAF) · New England Aquarium - Marine Conservation Action Fund (MCAF) · Rolling basis
For NGOs For Researchers Foundation Grant Global Biodiversity Capacity Building Coral Reefs Fisheries Marine Conservation Marine Protected Areas
Rolling
Schmidt Marine Technology Partners (Schmidt Family Foundation) · Schmidt Marine Technology Partners (a program of the Schmidt Family Foundation) · Rolling basis
For NGOs For Researchers For Startups Foundation Grant Global Blue Economy Fisheries Marine Conservation Pollution Research
Rolling
SPREP-AFD Pacific Ocean Initiative · Agence Française de Développement (AFD) via SPREP and Pacific Community (SPC) · Rolling basis (5-year programme, 2025-2030)
For NGOs Multilateral Grant Global Southeast Asia Biodiversity Capacity Building Climate Coral Reefs Fisheries Marine Conservation Marine Protected Areas
periodic
GEF Inclusive Conservation Initiative (ICI 1.0 & 2.0) · Global Environment Facility (GEF) · Rolling basis / GEF-8 cycle ends 2026; GEF-9 begins 2026-2030
For NGOs Multilateral Grant Global Biodiversity Capacity Building Climate Marine Conservation
Rolling
The Ocean Foundation Grantmaking · The Ocean Foundation · Rolling basis — Letters of Inquiry reviewed quarterly; open RFPs posted when available
For NGOs Foundation Grant Global Biodiversity Capacity Building Coastal Protection Education Marine Conservation Marine Protected Areas
Rolling
Schmidt Marine Technology Partners Grantmaking · Schmidt Marine Technology Partners (a programme of the Schmidt Family Foundation) · Rolling basis — proposals can be submitted via the online portal at any time.
For NGOs For Startups Foundation Grant Global Blue Economy Fisheries Marine Conservation Plastic Waste Research
Rolling
Earthwatch Institute - Ocean Ecosystems Research Grants · Earthwatch Institute · Rolling basis, starting April 2026 for new projects beginning in 2028
For Researchers Foundation Grant Global Biodiversity Marine Conservation Research
periodic
Pew-Gerstner Fellowships for Ocean Plastic Pollution Research · The Pew Charitable Trusts and Gerstner Philanthropies · Rolling; three Pew-Gerstner Fellows to be selected over two years (2025-2026). First fellow announced 2026.
For Researchers Foundation Grant Global Marine Conservation Plastic Waste Pollution Research
periodic
Shark Conservation Fund · Shark Conservation Fund (SCF) · Unknown
For NGOs For Researchers Philanthropic Network Grant Global Biodiversity Fisheries Marine Conservation Marine Protected Areas Research
periodic
NOAA IOOS Integrated Ocean Observing System Funding · NOAA U.S. Integrated Ocean Observing System (IOOS) Program Office · Varies by announcement. Check Grants.gov for current active NOFOs. No single blanket deadline.
For Researchers Government Grant Biodiversity Blue Economy Climate Coastal Protection Marine Conservation Research
periodic
Copernicus Grants and Public Procurements · European Union (Copernicus Programme / Mercator Ocean International / EUMETSAT / ECMWF) · Varies by tender. Current tenders: FRONT-END TOOLS WEB DEVELOPMENT closed 02/03/2026; BLUE MARKETS tender also recently closed. Upcoming tenders listed on the page.
Government Multilateral Grant Arctic Baltic Sea Mediterranean North Sea Blue Economy Marine Conservation Research